Mobile Crane #8421 — LEGO Technic Set Value
LEGO TechnicWhat the Mobile Crane #8421 LEGO set is worth — loose, complete, and sealed.
Mobile Crane #8421 value — Loose $92 · Complete (CIB) $164 · Sealed (new) $426. 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
- 5702014415409
- Brand
- LEGO
- Theme
- LEGO Technic
- Set number
- #8421
- Release date
- January 1, 2005
Mobile Crane #8421 (LEGO Technic) resale value
A loose Mobile Crane #8421 set runs around $92, a complete copy (all pieces + box + instructions) about $164, and a factory-sealed box commands $426.
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 | $92 | eBay sold comps |
| Complete (CIB) | $164 | eBay sold comps |
| Sealed (new) | $426 | eBay sold comps |
| Live asking — low / typical / high | $6.57 / $427.9 / $999.44 | 17 live eBay listings ↗ |
Market check: As of July 19, 2026, 17 live eBay listings ask $6.57–$999.44 (median $427.90).
Frequently asked questions
- What is the starting resale price for the Mobile Crane #8421?
- The loose version of the Mobile Crane #8421 starts at $71.
- How much is a brand new, sealed version of this LEGO Technic set?
- A sealed, new Mobile Crane #8421 is currently valued at $434.
- If my set is complete but not sealed, what is the estimated price?
- A complete in box (CIB) Mobile Crane #8421 can be expected to sell for $157.