Dark Side Developer Kit #9754 — LEGO Mindstorms Set Value
LEGO MindstormsWhat the Dark Side Developer Kit #9754 LEGO set is worth — loose, complete, and sealed.
Dark Side Developer Kit #9754 value — Loose $30 · Complete (CIB) $130 · Sealed (new) $140. 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
- 042884097547
- Brand
- LEGO
- Theme
- LEGO Mindstorms
- Set number
- #9754
- Release date
- January 1, 2000
Dark Side Developer Kit #9754 (LEGO Mindstorms) resale value
A loose Dark Side Developer Kit #9754 set runs around $30, a complete copy (all pieces + box + instructions) about $130, and a factory-sealed box commands $140.
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 | $30 | eBay sold comps |
| Complete (CIB) | $130 | eBay sold comps |
| Sealed (new) | $140 | eBay sold comps |
| Live asking — low / typical / high | $8 / $79.99 / $298 | 20 live eBay listings ↗ |
Market check: As of July 19, 2026, 20 live eBay listings ask $8.00–$298.00 (median $79.99).
Frequently asked questions
- What is the best deal for this LEGO Mindstorms kit?
- The best value depends on your needs; loose is $29, but sealed new is $136.
- Can I buy this kit in a complete condition?
- Yes, the complete (CIB) version is available for $130.
- Is the sealed version the most valuable?
- Yes, the sealed (new) condition is listed at $136.
