Ultimate Builders Set #3800 — LEGO Mindstorms Set Value
LEGO MindstormsWhat the Ultimate Builders Set #3800 LEGO set is worth — loose, complete, and sealed.
Ultimate Builders Set #3800 value — Loose $40 · Complete (CIB) $50 · Sealed (new) $84. Prices updated August 2026.
Theme · LEGO Mindstorms
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Item details
- Brand
- LEGO
- Theme
- LEGO Mindstorms
Ultimate Builders Set #3800 (LEGO Mindstorms) resale value
A loose Ultimate Builders Set #3800 set runs around $40, a complete copy (all pieces + box + instructions) about $50, and a factory-sealed box commands $84.
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 | $40 | eBay sold comps |
| Complete (CIB) | $50 | eBay sold comps |
| Sealed (new) | $84 | eBay sold comps |
Frequently asked questions
- What is the best deal for Ultimate Builders Set #3800?
- If you need it immediately, the Loose condition is the most affordable at $47.
- How much is the set if it is brand new and sealed?
- A sealed, new copy of the Ultimate Builders Set #3800 is currently listed for $95.
- Is the Complete (CIB) version worth buying over the loose version?
- Yes, the Complete (CIB) version offers better value for $87 compared to the loose version at $47.
