LEGO Supplementary Set 2307-1
LEGO Supplementary Set (2307-1) is estimated at about $24 sealed as of Sep 2026. Retired · 18 pieces · 1984 Duplo. Track its value and price history.
- Set number
- 2307-1
- Theme
- Duplo
- Year
- 1984
- Pieces
- 18
- Minifigures
- 0
- Market value
- $24 (Estimate, Sep 2026)
- Retirement
- Retired
Supplementary Set value by year
From $20 in 2017 to $24 (Estimate, Sep 2026): +20%. Its highest year was 2025, at $23.
| Year | Value | Change |
|---|---|---|
| Estimate, Sep 2026 | $24 | +2.1% |
| 2026 (so far) | $23 | −1.6% |
| 2025 | $23 | +2.5% |
| 2024 | $23 | +5.2% |
| 2023 | $21 | +1.5% |
| 2022 | $21 | +0.2% |
| 2021 | $21 | +0.7% |
| 2020 | $21 | +7.7% |
| 2019 | $19 | −1.3% |
| 2018 | $20 | −0.1% |
| 2017 | $20 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Supplementary Set (2307-1) worth?
LEGO Supplementary Set is worth approximately $24 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Supplementary Set retired?
Yes — Supplementary Set (2307-1) 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.
Why is LEGO Supplementary Set so expensive?
Supplementary Set was released in 1984 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.