# LEGO Transformer / Controller 12V (7864-1) — resale value

**LEGO Transformer / Controller 12V (7864-1)** — resale value from real closed eBay sales.

Values are medians of real closed eBay sales, updated 2026-06-27. 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.

## 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%2520Transformer%2520Controller%25207864-1%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%2520Transformer%2520Controller%25207864-1%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 |
| Set Number | 7864-1 |
| Theme | 12V |
| Year | 1980 |
| Pieces | 34 |

## FAQ

**How rare is the 1980 LEGO Transformer 12V set?**

As a 1980 release, the set number 7864-1 is a vintage piece, making it a desirable find for collectors.

**How many pieces are in the LEGO Transformer 12V set?**

The set 7864-1 contains a total of 34 pieces.

**What is the theme of this LEGO set?**

This specific item belongs to the 12V theme.

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Full price guide: https://junkpal.ai/products/lego-7864-1
How these values are computed: https://junkpal.ai/methodology
Cite as: "JunkPal price guide value as of 2026-06-27, based on real sold listings (junkpal.ai)"