LEGO Doctor Phosphorus 71020-18
LEGO Doctor Phosphorus (71020-18) is worth about $5 on the secondary market today, against a $5 retail price. It has 6 pieces, belongs to the Collectable Minifigures theme and was released in 2018. This set has retired — LEGO no longer produces it, so supply is fixed and prices are set entirely by the resale market.
- Set number
- 71020-18
- Theme
- Collectable Minifigures
- Subtheme
- The LEGO Batman Movie Series 2
- Year
- 2018
- Pieces
- 6
- Minifigures
- 1
- RRP
- $5
- Market value
- $5
- Released
- 2018
- Retirement
- Retired in 2018
Minifigures in LEGO Doctor Phosphorus
Doctor Phosphorus value by year
From $4 in 2017 to $5 in 2026 so far: +26%. Its highest year was 2020, at $6.
| Year | Value | Change |
|---|---|---|
| 2026 (so far) | $5 | −0.2% |
| 2025 | $5 | +3.4% |
| 2024 | $4 | +8.1% |
| 2023 | $4 | +3.3% |
| 2022 | $4 | −26.5% |
| 2021 | $5 | −6.0% |
| 2020 | $6 | +23.2% |
| 2019 | $5 | +4.1% |
| 2018 | $4 | +23.7% |
| 2017 | $4 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Doctor Phosphorus (71020-18) worth?
LEGO Doctor Phosphorus is worth approximately $5 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Doctor Phosphorus retired?
Yes — Doctor Phosphorus (71020-18) 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 Doctor Phosphorus gone up in value?
Not currently. Doctor Phosphorus launched at $5 and trades around $5 today, 9.4% below its retail price. The price history chart shows the full trend.
What is the price per piece for Doctor Phosphorus?
At its $5 retail price across 6 pieces, Doctor Phosphorus works out to about $0.833 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Doctor Phosphorus a good investment?
Doctor Phosphorus currently trades 9.4% below its $5 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 Doctor Phosphorus so expensive?
Doctor Phosphorus 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.