# The Mountain Cave #21137 — resale value

Source: JunkPal price guide — https://junkpal.ai/products/the-mountain-cave-21137-lego-minecraft-lego

**The Mountain Cave #21137** is worth about **$165** loose, based on real closed eBay sales. Sealed or new examples sell for around **$1,680**.

Live listings and the full sold-price history are on the page: https://junkpal.ai/products/the-mountain-cave-21137-lego-minecraft-lego

## Value by tier

| Condition | Value (USD) |
| --- | --- |
| Loose | $165 |
| Complete (CIB) | $881 |
| Sealed (new) | $1680 |

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: Steady.

## 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%2520Minecraft%2520The%2520Mountain%2520Cave%252021137%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%2520Minecraft%2520The%2520Mountain%2520Cave%252021137%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 | 673419263818 |
| Brand | LEGO |
| Theme | LEGO Minecraft |
| Set number | #21137 |
| Release date | January 1, 2017 |

## The Mountain Cave #21137 (LEGO Minecraft) resale value

A loose The Mountain Cave #21137 set runs around $165, a complete copy (all pieces + box + instructions) about $881, and a factory-sealed box commands $1680.

### 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 way to buy this set based on my budget?**

If you are budget-conscious, the loose version is available for $305. For a pristine collectible, the sealed option is $1578.

**How much is the complete, used version of this LEGO Minecraft set?**

The complete, in-box version (CIB) of The Mountain Cave #21137 is listed for $900.

**Is the sealed version worth the higher price point?**

Yes, the sealed, new version is priced at $1578, offering the highest collectible value for LEGO Minecraft fans.

---

Full price guide: https://junkpal.ai/products/the-mountain-cave-21137-lego-minecraft-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)"