LEGO Mountain Fortress (910029) Value
What does the LEGO Mountain Fortress (set 910029) actually sell for? Below are real eBay completed-sale medians, split by condition, with the most recent sold listings. That’s up 67% on its $380 retail price.
LEGO 910029 Mountain Fortress — what it sells for
⤢ enlarge+67%vs $380 RRP — sealed median $633 (1.7× retail)
Sealed
$633
range $612–$658
You’d net $551 after eBay fees
11 sold
New, factory-sealed (MISB).
Used — complete
$536
range $525–$547
You’d net $467 after eBay fees
2 sold (thin)
Opened/built, all pieces.
Recent real sold listings
Recent sold listings
| Listing | Condition | Sold | Price |
|---|---|---|---|
| LEGO 910029 Bricklink Designer Program Series 1 - Mountain Fortress | Sealed | 2026-06-03 | $700 |
| New & Sealed LEGO Bricklink Designer Program: Mountain Fortress Set 910029 | Sealed | 2026-06-01 | $648 |
| LEGO Bricklink Designer Program Mountain Fortress 910029 OPENED BUILT ONCE | Used — complete | 2026-05-28 | $558 |
| LEGO Bricklink Designer Program 910029 Mountain Fortress NISB | Sealed | 2026-05-26 | $684 |
| LEGO BRICKLINK 910029 Mountain Fortress NISB New & Sealed Designer Program | Sealed | 2026-05-26 | $640 |
| LEGO Bricklink Designer Program Mountain Fortress 910029 | Sealed | 2026-05-24 | $633 |
| LEGO Bricklink Designer Program 910029 Mountain Fortress NISB | Sealed | 2026-05-19 | $622 |
| Lego Bricklink Designer Program Series 1 Mountain Fortress 910029 Complete | Used — complete | 2026-05-14 | $514 |
| Lego Bricklink 910029 Mountain Fortress - New, Sealed | Sealed | 2026-05-13 | $620 |
| Lego Bricklink MOUNTAIN FORTRESS New Sealed 910029 | Sealed | 2026-05-13 | $668 |
How to read these numbers
Each figure above is the median of real eBay completed sales for the Mountain Fortress (set 910029) in that condition, including shipping. “Net” subtracts eBay’s ~13% fee — what you’d actually keep as the seller. Notice the spread between conditions: sealed around $633, used — complete around $536.
Prices move, so check the recent listings and run a fresh lookup before you buy or sell. For context, see the most valuable sets and other retired sets.
Frequently asked questions
How much is LEGO 910029 worth?
Based on recent eBay sold listings, the Mountain Fortress sells for a median of about $633 sealed, less in lower conditions. See the full condition breakdown above.
Are these asking prices or actual sales?
Actual completed (sold) eBay sales — not asking prices. The recent-listings table shows the individual sales behind the medians.
Is the Mountain Fortress retired?
Yes — set 910029 is retired, which is typically why used and sealed prices sit above the original RRP.