LEGO The Mountain Cave (21137) Value
What does the LEGO The Mountain Cave (set 21137) actually sell for? Below are real eBay completed-sale medians, split by condition, with the most recent sold listings. That’s up 540% on its $250 retail price.
LEGO 21137 The Mountain Cave — what it sells for
⤢ enlarge+540%vs $250 RRP — sealed median $1,600 (6.4× retail)
Sealed
$1,600
range $1,600–$1,600
You’d net $1,392 after eBay fees
1 sold (thin)
New, factory-sealed (MISB).
Used — complete
$772
range $46–$900
You’d net $672 after eBay fees
5 sold
Opened/built, all pieces.
Incomplete
$477
range $468–$486
You’d net $415 after eBay fees
2 sold (thin)
Missing pieces, box or instructions.
Recent real sold listings
Recent sold listings
| Listing | Condition | Sold | Price |
|---|---|---|---|
| Lego Minecraft The Mountain Cave 21137 (Used, no box, no instruction) | Incomplete | 2026-06-02 | $494 |
| LEGO Minecraft: The Mountain Cave (21137) INSTRUCTION BOOK ONLY | Used — complete | 2026-05-31 | $46 |
| LEGO ⛏️Minecraft 21137 - THE MOUNTAIN CAVE 100% Certified Complete Collectible | Used — complete | 2026-05-31 | $900 |
| LEGO Angry Wolf From 21137 The Mountain Cave HEAD ONLY | Used — complete | 2026-05-24 | $33 |
| LEGO Minecraft: The Mountain Cave (21137) 98% Complete-Missing Treasure Cart | Incomplete | 2026-05-19 | $460 |
| Lego 21137 Mountain Cave Used, comes 100% complete with instructions | Used — complete | 2026-05-11 | $772 |
| OPEN BOX WITH SEALED CONTENT LEGO® Minecraft™ set 21137: The Mountain Cave | Sealed | 2026-05-10 | $1,600 |
| LEGO Minecraft: The Mountain Cave (21137) 2862/2863 Pieces W/ Box & Manual. | Used — complete | 2026-05-09 | $1,004 |
How to read these numbers
Each figure above is the median of real eBay completed sales for the The Mountain Cave (set 21137) 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 $1,600, used — complete around $772, incomplete around $477.
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 21137 worth?
Based on recent eBay sold listings, the The Mountain Cave sells for a median of about $1,600 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 The Mountain Cave retired?
Yes — set 21137 is retired, which is typically why used and sealed prices sit above the original RRP.