A leftover runner can be useful to another builder, but only if they can identify exactly what is still attached. “Spare Gundam parts” leaves too many questions unanswered. A strong listing tells a buyer which release the parts came from, what they will receive, and what condition it is in.
Inventory first, photograph second, and write the listing from that inventory. This is especially important when several similar kits have shared a workbench.
Confirm that the parts are truly spare
Finish checking your own build and its accessory options before selling leftovers. Some manuals mark unused parts, but other pieces are intended for alternate configurations or accessories you have not assembled yet. Do not rely on the fact that a piece remains on a runner after your first assembly session.
Keep the exact kit name, grade, scale, version, and box product information together. A runner letter alone is not enough: many unrelated kits use an A runner, and a similarly named release may contain a different molding or color.
If the origin is uncertain, say so. Do not turn a visual resemblance into a compatibility guarantee. Buyers looking for a specific repair often need an exact version rather than a part that looks approximately right.
Build a simple inventory
List each runner identifier and the attached part numbers you are offering. For loose parts, create a separate entry and show how you identified them. If a number cannot be confirmed, label it as unconfirmed rather than assigning your best guess.
Included: runner sections and individual parts, stated explicitly.
Missing: removed parts visible on a partial runner.
Condition: unpainted, painted, assembled, disassembled, cut, sanded, repaired, or damaged as applicable.
Quantity: the exact number of each repeated item.
Extras: only the instructions, packaging, or accessories that will actually be included.
Keep the inventory beside the physical lot until it sells. Mixing another build’s leftovers into the same bag after taking photographs defeats the purpose of a careful listing.
Take photos that answer identification questions
Use a plain background and diffuse light. Include one overview of the complete lot, then closer images of runner identifiers, part numbers, and any defects. Keep important markings in focus and avoid filters that change the color or conceal surface wear.
Show both sides when the reverse helps identify a connector, peg, or repair. For a partial runner, frame the missing spaces clearly rather than cropping them away. A close view of a damaged tab is more useful than a reassuring adjective in the description.
A manufacturer image can help illustrate a complete kit, but it cannot prove the contents or condition of your spare lot. Use your own photos for the actual sale. The illustrations in this guide are listing aids, not photographs of an available runner lot.
Write a title that a buyer can search
Use this structure: exact kit name and version + grade/scale + runner or part identifiers + condition. Keep the most distinctive identifiers near the beginning.
For example, a description template might read: “Genuine spare parts from [exact kit and release]. Includes [runner and attached part numbers]. [Removed or missing parts] are not included. Condition: [specific observations]. Photos show the actual items. Please compare with your manual before purchasing.” Replace every bracket with verified information.
Do not call a partial runner “complete,” use “new” to conceal removed parts, or imply that a spare lot includes a full model kit. If you are selling an assembled component, disclose that clearly and describe any paint, adhesive, or repair.
Use the Bounty Board route that fits
Artrovo Gundam’s seller page explains two routes: create a For Sale listing, or respond to a buyer’s Wanted bounty. Read the live marketplace policies and complete the required seller onboarding before transacting.
The policies currently require seller profile setup and connected Stripe verification for payments and payouts, and limit the marketplace to the United States. Use the live pages for current eligibility, fees, payment handling, and dispute rules rather than relying on a saved screenshot or an old listing.
For a Wanted response, compare the requested identifiers with your inventory before offering. A photo and an explicit list of included parts help the buyer confirm the match without a long exchange about what “similar runner” means.
Pack for small, fragile shapes
Choose packaging around the most vulnerable part, not just the overall runner size. Long antennas, narrow connections, and protruding pegs need room and protection from pressure. Do not force a runner into a container that bends it.
Keep loose parts contained and identified so they cannot disappear into packing material. Cushion the lot inside a suitably rigid outer package and prevent movement without crushing the contents. Avoid adhesive directly on the parts or decals.
Recheck the inventory while packing, then keep a clear record of the packed contents. Use the shipping process shown for the transaction. Protect private address and order information if you take photos for your own records; those details do not belong in the public listing.
List genuine spares, describe them honestly
The Bounty Board distinguishes genuine spare-part trading from original custom print work. Do not list printed reproductions of official kit parts as replacements. If a buyer needs a missing component, the genuine replacement-parts guide is a useful companion to their search.
Ready to sort your leftovers? Start with one clearly identified lot, photograph it accurately, and follow the Bounty Board seller steps. A precise small listing is easier for another builder to trust than a large mystery bag.