LEGO Mermaid Key Chain 851393-1
LEGO Mermaid Key Chain (851393-1) is estimated at about $9 sealed as of Sep 2026 (retail $6). Retired 2016 · 2015 Gear. Track its value and price history.
- Set number
- 851393-1
- Theme
- Gear
- Subtheme
- Key Chains/Miscellaneous
- Year
- 2015
- Minifigures
- 0
- RRP
- $6
- Market value
- $9 (Estimate, Sep 2026)
- Released
- 2015
- Retirement
- Retired in 2016
Mermaid Key Chain value by year
From $5 in 2016 to $9 (Estimate, Sep 2026): +72%. Its highest year was 2023, at $11.
| Year | Value | Change |
|---|---|---|
| Estimate, Sep 2026 | $9 | +12.5% |
| 2026 (so far) | $7 | −10.2% |
| 2025 | $8 | −8.5% |
| 2024 | $9 | −20.0% |
| 2023 | $11 | +18.0% |
| 2022 | $9 | +35.5% |
| 2021 | $7 | +13.9% |
| 2020 | $6 | +3.2% |
| 2019 | $6 | −8.3% |
| 2018 | $6 | +29.4% |
| 2017 | $5 | −6.3% |
| 2016 | $5 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Mermaid Key Chain (851393-1) worth?
LEGO Mermaid Key Chain is worth approximately $9 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Mermaid Key Chain retired?
Yes — Mermaid Key Chain (851393-1) 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 Mermaid Key Chain gone up in value?
Yes. Mermaid Key Chain launched at $6 and now trades around $9, an increase of 46.1%. See the price history chart for how it got there.
Is LEGO Mermaid Key Chain a good investment?
Mermaid Key Chain currently trades 46.1% above its $6 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 Mermaid Key Chain so expensive?
Mermaid Key Chain was released in 2015 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.