# \(Group Buy\) CRP R4 \| live price, prepared checkout ## Built for shopping agents: what RoboTrunk does for every product We asked shopping agents, including Meta's Muse first-hand, what they need from a store. This is what they asked for, and what we have built. RoboTrunk is working through its catalogue, so a step may not be done for this one yet. Where a step is done per product, the line ends with what is done for this product. - **Deep research:** We read the maker's manual, independent reviews, video review transcripts and the store's own page, and publish each finding with its source and the date read. `check_product` returns them with a source for each. *This product:* no checked facts are published yet. `enrich_product` starts the research on it now, and `check_product` answers with what is known. - **Receipts:** Every published fact has a receipt showing its source quote. `check_product` and `get_product` return the checked facts that have one. *This product:* no receipted facts are published on this page yet; RoboTrunk is receipting its catalogue product by product. - **Safety:** `check_product` asks the product-safety regulators live (US CPSC, NHTSA and FDA, Health Canada, the UK's OPSS, Australia's ACCC) whether a recall names a product, listed here or not, and flags a match with its notice; a recall never blocks the buyer. *This product:* this page holds no recall result for it yet; `check_product` asks the regulators now. - **Recall watch:** `watch_recalls` tells the buyer if a product bought here is recalled later. - **Second-hand listings:** `check_listing` runs the same recall check on a second-hand listing someone found, and adds what the listing leaves out and the price new. - **The real price:** The full price to the buyer's country, with shipping and tax, each part quoted from the store's policy or, where a part is not settled, what the total depends on: `check_product` and `search_catalog` take the buyer's country and postcode. *This product:* this store's price was read from its catalogue at 2026-10-19T19:23:34.188Z. - **A checkout that finishes:** RoboTrunk lists only stores whose agent checkout it has verified. `create_checkout` prepares the order at the store; `complete_checkout` returns a link to the store's own checkout. The checkout can be finished in either of two ways: the person taps the link in their own browser, or their agent opens it and completes the checkout. RoboTrunk checks the store's total against a budget ceiling before it issues the link. Payment always happens on the store's own page, and RoboTrunk never holds the money. No store pays for placement; RoboTrunk may earn a commission from some stores via their affiliate programs. - **Markdown copy:** Every page has a Markdown copy: [this page's copy](https://robotrunk.com/products/ucp/prototypist-net/6575991685186.md). - **Photos and ratings:** Search results carry the product photo and, where the store's own page publishes one, its rating (`search_catalog`). - **Fit answers:** `check_fit` answers whether a listing fits a car, pram or bottle, with the exact quote from the store's page, or says it is not known. - **Back-in-stock watches:** `watch_back_in_stock` starts a watch on a listing the store shows as sold out; `get_back_in_stock_watch` shows when it is back in stock. - **Maker's manual:** `ask_product_manual` answers from the maker's manual with the exact passage and page, or says the manual does not cover it. - **Tools and guide:** Every tool and its description is at https://robotrunk.com/mcp; the guide is at [/agents\.md](/agents.md). - **Research from other stores:** Coming soon: reading other stores' listings of the same product as research sources. Sold and shipped by prototypist\.net, prototypist.net; payment happens on the store's own checkout. Brand: HammerWorks ## Variants - 2551 HAD: GBP 87.50; out of stock. Variant id: `gid://shopify/ProductVariant/39330214871106` - Seller: prototypist\.net. Price: GBP 87\.50. Stock: out of stock. Variant: 2551 HAD, variant id `gid://shopify/ProductVariant/39330214871106`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330214871106). - Desko Black: GBP 87.50; out of stock. Variant id: `gid://shopify/ProductVariant/39330214903874` - Seller: prototypist\.net. Price: GBP 87\.50. Stock: out of stock. Variant: Desko Black, variant id `gid://shopify/ProductVariant/39330214903874`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330214903874). - Xerox 6001 Russia: GBP 60.00; out of stock. Variant id: `gid://shopify/ProductVariant/39330214936642` - Seller: prototypist\.net. Price: GBP 60\.00. Stock: out of stock. Variant: Xerox 6001 Russia, variant id `gid://shopify/ProductVariant/39330214936642`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330214936642). - 6575 Beige: GBP 7.50; out of stock. Variant id: `gid://shopify/ProductVariant/39330214969410` - Seller: prototypist\.net. Price: GBP 7\.50. Stock: out of stock. Variant: 6575 Beige, variant id `gid://shopify/ProductVariant/39330214969410`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330214969410). - 6575 White: GBP 7.50; out of stock. Variant id: `gid://shopify/ProductVariant/39330215002178` - Seller: prototypist\.net. Price: GBP 7\.50. Stock: out of stock. Variant: 6575 White, variant id `gid://shopify/ProductVariant/39330215002178`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330215002178). - Alphas APL: GBP 40.00; out of stock. Variant id: `gid://shopify/ProductVariant/39330215034946` - Seller: prototypist\.net. Price: GBP 40\.00. Stock: out of stock. Variant: Alphas APL, variant id `gid://shopify/ProductVariant/39330215034946`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330215034946). - Alphas Arabic: GBP 32.50; out of stock. Variant id: `gid://shopify/ProductVariant/39330215067714` - Seller: prototypist\.net. Price: GBP 32\.50. Stock: out of stock. Variant: Alphas Arabic, variant id `gid://shopify/ProductVariant/39330215067714`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330215067714). - Alphas EN: GBP 26.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330215100482` - Seller: prototypist\.net. Price: GBP 26\.66. Stock: out of stock. Variant: Alphas EN, variant id `gid://shopify/ProductVariant/39330215100482`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330215100482). - Alphas Greek: GBP 30.00; out of stock. Variant id: `gid://shopify/ProductVariant/39330215133250` - Seller: prototypist\.net. Price: GBP 30\.00. Stock: out of stock. Variant: Alphas Greek, variant id `gid://shopify/ProductVariant/39330215133250`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330215133250). - Alphas Hebrew Blue: GBP 26.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330215166018` - Seller: prototypist\.net. Price: GBP 26\.66. Stock: out of stock. Variant: Alphas Hebrew Blue, variant id `gid://shopify/ProductVariant/39330215166018`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330215166018). - Alphas Hebrew Green: GBP 26.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330216149058` - Seller: prototypist\.net. Price: GBP 26\.66. Stock: out of stock. Variant: Alphas Hebrew Green, variant id `gid://shopify/ProductVariant/39330216149058`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216149058). - Alphas Japanese: GBP 30.00; out of stock. Variant id: `gid://shopify/ProductVariant/39330216214594` - Seller: prototypist\.net. Price: GBP 30\.00. Stock: out of stock. Variant: Alphas Japanese, variant id `gid://shopify/ProductVariant/39330216214594`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216214594). - Alphas Orange RU Cyrillic: GBP 26.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330216280130` - Seller: prototypist\.net. Price: GBP 26\.66. Stock: out of stock. Variant: Alphas Orange RU Cyrillic, variant id `gid://shopify/ProductVariant/39330216280130`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216280130). - Alphas Red RU Cyrillic: GBP 26.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330216312898` - Seller: prototypist\.net. Price: GBP 26\.66. Stock: out of stock. Variant: Alphas Red RU Cyrillic, variant id `gid://shopify/ProductVariant/39330216312898`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216312898). - Alphas TS Peacock: GBP 40.00; out of stock. Variant id: `gid://shopify/ProductVariant/39330216378434` - Seller: prototypist\.net. Price: GBP 40\.00. Stock: out of stock. Variant: Alphas TS Peacock, variant id `gid://shopify/ProductVariant/39330216378434`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216378434). - Alphas Tulip: GBP 35.00; out of stock. Variant id: `gid://shopify/ProductVariant/39330216443970` - Seller: prototypist\.net. Price: GBP 35\.00. Stock: out of stock. Variant: Alphas Tulip, variant id `gid://shopify/ProductVariant/39330216443970`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216443970). - Desko Colour: GBP 11.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330216476738` - Seller: prototypist\.net. Price: GBP 11\.66. Stock: out of stock. Variant: Desko Colour, variant id `gid://shopify/ProductVariant/39330216476738`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216476738). - Icon Beige: GBP 13.33; out of stock. Variant id: `gid://shopify/ProductVariant/39330216542274` - Seller: prototypist\.net. Price: GBP 13\.33. Stock: out of stock. Variant: Icon Beige, variant id `gid://shopify/ProductVariant/39330216542274`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216542274). - Icon White: GBP 13.33; out of stock. Variant id: `gid://shopify/ProductVariant/39330216575042` - Seller: prototypist\.net. Price: GBP 13\.33. Stock: out of stock. Variant: Icon White, variant id `gid://shopify/ProductVariant/39330216575042`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216575042). - Modern MAC Beige: GBP 13.33; out of stock. Variant id: `gid://shopify/ProductVariant/39330216640578` - Seller: prototypist\.net. Price: GBP 13\.33. Stock: out of stock. Variant: Modern MAC Beige, variant id `gid://shopify/ProductVariant/39330216640578`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216640578). - Modern MAC White: GBP 13.33; out of stock. Variant id: `gid://shopify/ProductVariant/39330216706114` - Seller: prototypist\.net. Price: GBP 13\.33. Stock: out of stock. Variant: Modern MAC White, variant id `gid://shopify/ProductVariant/39330216706114`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216706114). - Mods 60s Beige: GBP 28.33; out of stock. Variant id: `gid://shopify/ProductVariant/39330216771650` - Seller: prototypist\.net. Price: GBP 28\.33. Stock: out of stock. Variant: Mods 60s Beige, variant id `gid://shopify/ProductVariant/39330216771650`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216771650). - Mods 60s White: GBP 28.33; out of stock. Variant id: `gid://shopify/ProductVariant/39330216837186` - Seller: prototypist\.net. Price: GBP 28\.33. Stock: out of stock. Variant: Mods 60s White, variant id `gid://shopify/ProductVariant/39330216837186`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216837186). - Mods 80s Beige: GBP 31.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330216902722` - Seller: prototypist\.net. Price: GBP 31\.66. Stock: out of stock. Variant: Mods 80s Beige, variant id `gid://shopify/ProductVariant/39330216902722`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216902722). - Mods 80s White: GBP 31.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330216968258` - Seller: prototypist\.net. Price: GBP 31\.66. Stock: out of stock. Variant: Mods 80s White, variant id `gid://shopify/ProductVariant/39330216968258`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330216968258). - Mods all\-in Beige: GBP 45.83; out of stock. Variant id: `gid://shopify/ProductVariant/39330217066562` - Seller: prototypist\.net. Price: GBP 45\.83. Stock: out of stock. Variant: Mods all\-in Beige, variant id `gid://shopify/ProductVariant/39330217066562`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330217066562). - Mods all\-in White: GBP 45.83; out of stock. Variant id: `gid://shopify/ProductVariant/39330217099330` - Seller: prototypist\.net. Price: GBP 45\.83. Stock: out of stock. Variant: Mods all\-in White, variant id `gid://shopify/ProductVariant/39330217099330`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330217099330). - Numpad Beige: GBP 18.33; out of stock. Variant id: `gid://shopify/ProductVariant/39330217164866` - Seller: prototypist\.net. Price: GBP 18\.33. Stock: out of stock. Variant: Numpad Beige, variant id `gid://shopify/ProductVariant/39330217164866`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330217164866). - Numpad White: GBP 18.33; out of stock. Variant id: `gid://shopify/ProductVariant/39330217197634` - Seller: prototypist\.net. Price: GBP 18\.33. Stock: out of stock. Variant: Numpad White, variant id `gid://shopify/ProductVariant/39330217197634`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330217197634). - R5A Beige: GBP 10.00; out of stock. Variant id: `gid://shopify/ProductVariant/39330217295938` - Seller: prototypist\.net. Price: GBP 10\.00. Stock: out of stock. Variant: R5A Beige, variant id `gid://shopify/ProductVariant/39330217295938`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330217295938). - R5A White: GBP 10.00; out of stock. Variant id: `gid://shopify/ProductVariant/39330217361474` - Seller: prototypist\.net. Price: GBP 10\.00. Stock: out of stock. Variant: R5A White, variant id `gid://shopify/ProductVariant/39330217361474`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330217361474). - Spacebar Beige: GBP 6.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330217394242` - Seller: prototypist\.net. Price: GBP 6\.66. Stock: out of stock. Variant: Spacebar Beige, variant id `gid://shopify/ProductVariant/39330217394242`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330217394242). - Spacebar White: GBP 6.66; out of stock. Variant id: `gid://shopify/ProductVariant/39330217459778` - Seller: prototypist\.net. Price: GBP 6\.66. Stock: out of stock. Variant: Spacebar White, variant id `gid://shopify/ProductVariant/39330217459778`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330217459778). - Windows Black: GBP 3.75; out of stock. Variant id: `gid://shopify/ProductVariant/39330217525314` - Seller: prototypist\.net. Price: GBP 3\.75. Stock: out of stock. Variant: Windows Black, variant id `gid://shopify/ProductVariant/39330217525314`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330217525314). - Windows Green: GBP 3.75; out of stock. Variant id: `gid://shopify/ProductVariant/39330220638274` - Seller: prototypist\.net. Price: GBP 3\.75. Stock: out of stock. Variant: Windows Green, variant id `gid://shopify/ProductVariant/39330220638274`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330220638274). - Windows Tulip: GBP 3.75; out of stock. Variant id: `gid://shopify/ProductVariant/39330220671042` - Seller: prototypist\.net. Price: GBP 3\.75. Stock: out of stock. Variant: Windows Tulip, variant id `gid://shopify/ProductVariant/39330220671042`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330220671042). - Windows Blue: GBP 3.75; out of stock. Variant id: `gid://shopify/ProductVariant/39330220703810` - Seller: prototypist\.net. Price: GBP 3\.75. Stock: out of stock. Variant: Windows Blue, variant id `gid://shopify/ProductVariant/39330220703810`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330220703810). - Windows Cherry: GBP 3.75; out of stock. Variant id: `gid://shopify/ProductVariant/39330220769346` - Seller: prototypist\.net. Price: GBP 3\.75. Stock: out of stock. Variant: Windows Cherry, variant id `gid://shopify/ProductVariant/39330220769346`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330220769346). - Windows Traditional: GBP 3.75; out of stock. Variant id: `gid://shopify/ProductVariant/39330220834882` - Seller: prototypist\.net. Price: GBP 3\.75. Stock: out of stock. Variant: Windows Traditional, variant id `gid://shopify/ProductVariant/39330220834882`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://prototypist-3.myshopify.com/products/group-buy-crp-r4). [Get ready to buy from prototypist\.net: prepare checkout](/checkout-prepare?merchant=prototypist-net&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6575991685186&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F39330220834882). To buy this through RoboTrunk, pass merchant `prototypist-net`, product_id `gid://shopify/Product/6575991685186` and one variant_id from the list above. Product image of \(Group Buy\) CRP R4, supplied by prototypist\.net: This product on prototypist.net: Retrieved 2026-10-19T19:23:34.188Z from This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)