LEGO Basic Building Set, 3+ 7-1
LEGO Basic Building Set, 3+ (7-1) is estimated at about $29 sealed as of Sep 2026 (retail $4). Retired · 64 pieces · 1978 Basic.
- Set number
- 7-1
- Theme
- Basic
- Year
- 1978
- Pieces
- 64
- Minifigures
- 0
- RRP
- $4
- Market value
- $29 (Estimate, Sep 2026)
- Retirement
- Retired
Basic Building Set, 3+ value by year
From $20 in 2011 to $29 (Estimate, Sep 2026): +44%. Its highest year was 2026, at $32.
| Year | Value | Change |
|---|---|---|
| Estimate, Sep 2026 | $29 | +60.6% |
| 2026 (so far) | $32 | +73.5% |
| 2025 | $18 | +35.4% |
| 2024 | $13 | −41.4% |
| 2023 | $23 | +89.2% |
| 2022 | $12 | +147.3% |
| 2021 | $5 | −70.0% |
| 2020 | $16 | −33.1% |
| 2019 | $24 | +2.1% |
| 2018 | $24 | +2.2% |
| 2017 | $23 | +2.3% |
| 2016 | $23 | +2.3% |
| 2015 | $22 | +2.4% |
| 2014 | $22 | +2.4% |
| 2013 | $21 | +2.4% |
| 2012 | $21 | +2.6% |
| 2011 | $20 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Basic Building Set, 3+ (7-1) worth?
LEGO Basic Building Set, 3+ is worth approximately $29 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Basic Building Set, 3+ retired?
Yes — Basic Building Set, 3+ (7-1) 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 Basic Building Set, 3+ gone up in value?
Yes. Basic Building Set, 3+ launched at $4 and now trades around $29, an increase of 736.3%. See the price history chart for how it got there.
What is the price per piece for Basic Building Set, 3+?
At its $4 retail price across 64 pieces, Basic Building Set, 3+ works out to about $0.055 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Basic Building Set, 3+ a good investment?
Basic Building Set, 3+ currently trades 736.3% 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 Basic Building Set, 3+ so expensive?
Basic Building Set, 3+ was released in 1978 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.