Ultimate Accessory Set #3801 — LEGO Mindstorms Set Value
LEGO MindstormsWhat the Ultimate Accessory Set #3801 LEGO set is worth — loose, complete, and sealed.
Ultimate Accessory Set #3801 value — Loose $14 · Complete (CIB) $32 · Sealed (new) $49. Prices updated August 2026.
Theme · LEGO Mindstorms
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Item details
- Brand
- LEGO
- Theme
- LEGO Mindstorms
Ultimate Accessory Set #3801 (LEGO Mindstorms) resale value
A loose Ultimate Accessory Set #3801 set runs around $14, a complete copy (all pieces + box + instructions) about $32, and a factory-sealed box commands $49.
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 | $14 | eBay sold comps |
| Complete (CIB) | $32 | eBay sold comps |
| Sealed (new) | $49 | eBay sold comps |
Frequently asked questions
- What is the best deal for Ultimate Accessory Set #3801?
- If you don't need the box, the loose version is the most affordable at $16.
- Can I buy this set in new, unopened condition?
- Yes, the sealed, new version of Ultimate Accessory Set #3801 is available for $50.
- How much is the complete, in-box version of this Mindstorms set?
- The Complete (CIB) version of Ultimate Accessory Set #3801 is priced at $28.
