Robot Inventor #51515 — LEGO Mindstorms Set Value
LEGO MindstormsWhat the Robot Inventor #51515 LEGO set is worth — loose, complete, and sealed.
Robot Inventor #51515 value — Loose $218 · Complete (CIB) $499 · Sealed (new) $637. Prices updated July 2026.
Monthly CIB value, based on sold comps.
See the actual sold listings on eBay ↗Live on eBay right now
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Price data verified against · 1
Item details
- UPC / EAN
- 5702016369861
- Brand
- LEGO
- Theme
- LEGO Mindstorms
- Set number
- #51515
- Release date
- January 1, 2020
Robot Inventor #51515 (LEGO Mindstorms) resale value
A loose Robot Inventor #51515 set runs around $218, a complete copy (all pieces + box + instructions) about $499, and a factory-sealed box commands $637.
What drives the price
Retired sets, completeness (every piece + minifigs + instructions + box), and sealed condition drive LEGO value. Exclusive sets and discontinued themes appreciate the most; minifigs alone can carry significant value.
Price guide
What this actually trades for — sold values by condition vs. what sellers are asking today
| Condition | Value | Based on |
|---|---|---|
| Loose | $218 | eBay sold comps |
| Complete (CIB) | $499 | eBay sold comps |
| Sealed (new) | $637 | eBay sold comps |
| Live asking — low / typical / high | $19.99 / $750 / $1,600 | 20 live eBay listings ↗ |
Market check: As of July 18, 2026, 20 live eBay listings ask $19.99–$1,600.00 (median $750.00).
Frequently asked questions
- What is the lowest resale price for Robot Inventor #51515?
- The loose version of LEGO Mindstorms Robot Inventor #51515 can be found for around $206.
- How much is a brand new, sealed set worth?
- A sealed, new copy of the Robot Inventor #51515 is valued at $625.
- Is a complete set worth more than a loose one?
- Yes, a complete set (CIB) is valued at $525, significantly more than the loose condition price of $206.
