# Mountain Fortress #910029 — resale value

**Mountain Fortress #910029** is worth about **$438** loose, based on real closed eBay sales. Sealed or new examples sell for around **$585**.

## Value by tier

| Condition | Value (USD) |
| --- | --- |
| Loose | $438 |
| Complete (CIB) | $575 |
| Sealed (new) | $585 |

Values are medians of real closed eBay sales, updated 2026-08-07. 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 · +9%.

## 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%2520Mountain%2520Fortress%2520910029%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%2520Mountain%2520Fortress%2520910029%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

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## Details

| Field | Value |
| --- | --- |
| Brand | LEGO |
| Theme | LEGO Bricklink Designer Program |
| Set number | #910029 |

## Mountain Fortress #910029 (LEGO Bricklink Designer Program) resale value

A loose Mountain Fortress #910029 set runs around $438, a complete copy (all pieces + box + instructions) about $575, and a factory-sealed box commands $585.

### 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 best value condition for Mountain Fortress #910029?**

The best value depends on your needs; the loose version is available for $421, while the sealed version is $582.

**Is the complete version worth buying over the loose version?**

The complete version is priced at $483, offering more than the loose option at $421.

**Where can I find this LEGO Bricklink Designer Program set?**

This item is available on the marketplace in loose, complete, and sealed new conditions.

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Full price guide: https://junkpal.ai/products/mountain-fortress-910029-lego-bricklink-designer-program-lego
How these values are computed: https://junkpal.ai/methodology
Cite as: "JunkPal price guide value as of 2026-08-07, based on real sold listings (junkpal.ai)"