LEGO Mermaid Batman 71020-5
LEGO Mermaid Batman (71020-5) is estimated at about $5 sealed as of Sep 2026 (retail $4). Retired 2018 · 6 pieces · 2018 Collectable Minifigures.
- Set number
- 71020-5
- Theme
- Collectable Minifigures
- Subtheme
- The LEGO Batman Movie Series 2
- Year
- 2018
- Pieces
- 6
- Minifigures
- 1
- RRP
- $4
- Market value
- $5 (Estimate, Sep 2026)
- Released
- 2018
- Retirement
- Retired in 2018
Minifigures in LEGO Mermaid Batman
Mermaid Batman value by year
From $4 in 2018 to $5 (Estimate, Sep 2026): +6%. Its highest year was 2020, at $5.
| Year | Value | Change |
|---|---|---|
| Estimate, Sep 2026 | $5 | −3.2% |
| 2025 | $5 | +4.4% |
| 2024 | $5 | +8.6% |
| 2023 | $4 | +12.0% |
| 2022 | $4 | −4.3% |
| 2021 | $4 | −20.0% |
| 2020 | $5 | +11.6% |
| 2019 | $4 | +1.2% |
| 2018 | $4 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Mermaid Batman (71020-5) worth?
LEGO Mermaid Batman is worth approximately $5 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Mermaid Batman retired?
Yes — Mermaid Batman (71020-5) 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 Batman gone up in value?
Yes. Mermaid Batman launched at $4 and now trades around $5, an increase of 15.5%. See the price history chart for how it got there.
What is the price per piece for Mermaid Batman?
At its $4 retail price across 6 pieces, Mermaid Batman works out to about $0.665 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Mermaid Batman a good investment?
Mermaid Batman currently trades 15.5% 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 Mermaid Batman so expensive?
Mermaid Batman was released in 2018 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.