# Mobile Crane #8421 — resale value

**Mobile Crane #8421** is worth about **$92** loose, based on real closed eBay sales. Sealed or new examples sell for around **$425.59**.

## Value by tier

| Condition | Value (USD) |
| --- | --- |
| Loose | $92 |
| Complete (CIB) | $164 |
| Sealed (new) | $426 |

Values are medians of real closed eBay sales, updated 2026-07-31. They are estimates for reference, not offers or appraisals — condition, completeness and edition move them a lot, so compare against the sold listings before pricing anything.

Recent movement: Rising · +12%.

## Check the market

- [Sold listings on eBay](https://junkpal.ai/api/go?to=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DLEGO%2520Technic%25208421%26LH_Sold%3D1%26LH_Complete%3D1%26mkcid%3D1%26mkrid%3D711-53200-19255-0%26siteid%3D0%26campid%3D5339166094%26toolid%3D10001%26mkevt%3D1%26customid%3Dmd-sold&p=md-sold) — the closed sales these medians are computed from
- [Live listings on eBay](https://junkpal.ai/api/go?to=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DLEGO%2520Technic%25208421%26mkcid%3D1%26mkrid%3D711-53200-19255-0%26siteid%3D0%26campid%3D5339166094%26toolid%3D10001%26mkevt%3D1%26customid%3Dmd-live&p=md-live) — what sellers are asking right now

eBay links are affiliate links: JunkPal may earn a commission at no cost to you.

## Details

| Field | Value |
| --- | --- |
| 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.

## FAQ

**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.

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Full price guide: https://junkpal.ai/products/mobile-crane-8421-lego-technic-lego
How these values are computed: https://junkpal.ai/methodology
Cite as: "JunkPal price guide value as of 2026-07-31, based on real sold listings (junkpal.ai)"