LEGO Tuner X 8666-1
LEGO Tuner X (8666-1) is estimated at about $8 sealed as of Sep 2026 (retail $4). Retired 2006 · 61 pieces · 2006 Racers. Track its value and price history.
- Set number
- 8666-1
- Theme
- Racers
- Subtheme
- Tiny Turbos
- Year
- 2006
- Pieces
- 61
- Minifigures
- 0
- RRP
- $4
- Market value
- $8 (Estimate, Sep 2026)
- Used value
- $4
- Released
- 2006
- Retirement
- Retired in 2006
Tuner X value by year
From $6 in 2016 to $8 (Estimate, Sep 2026): +33%. Its highest year was 2019, at $10.
| Year | Value | Change |
|---|---|---|
| Estimate, Sep 2026 | $8 | −4.9% |
| 2026 (so far) | $7 | −16.2% |
| 2025 | $9 | −3.9% |
| 2024 | $9 | −7.2% |
| 2023 | $10 | +17.4% |
| 2022 | $8 | −2.0% |
| 2021 | $8 | −15.7% |
| 2020 | $10 | −0.9% |
| 2019 | $10 | +28.7% |
| 2018 | $8 | +25.4% |
| 2017 | $6 | +1.5% |
| 2016 | $6 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Tuner X (8666-1) worth?
LEGO Tuner X is worth approximately $8 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Tuner X retired?
Yes — Tuner X (8666-1) has been retired by LEGO and is no longer in production. Retired sets have fixed supply, which is why their prices are driven purely by the resale market.
Has LEGO Tuner X gone up in value?
Yes. Tuner X launched at $4 and now trades around $8, an increase of 102.7%. See the price history chart for how it got there.
What is the price per piece for Tuner X?
At its $4 retail price across 61 pieces, Tuner X works out to about $0.066 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Tuner X a good investment?
Tuner X currently trades 102.7% above its $4 retail price, and it is retired, so no new supply is entering the market. Past performance is not a prediction — condition, packaging and how long you hold all affect what a set actually sells for. BrickStats reports the numbers rather than giving investment advice.
Why is LEGO Tuner X so expensive?
Tuner X was released in 2006 and has since retired. Once LEGO stops producing a set, the only supply is what is already in circulation, so sealed copies in good condition compete for a shrinking pool of stock. That scarcity, not the parts, is what moves the price.