LEGO Locomotive Blue Bricks 3743-1
LEGO Locomotive Blue Bricks (3743-1) is estimated at about $27 sealed as of Sep 2026 (retail $7). Retired · 106 pieces · 2001 Trains.
- Set number
- 3743-1
- Theme
- Trains
- Subtheme
- 9V
- Year
- 2001
- Pieces
- 106
- Minifigures
- 0
- RRP
- $7
- Market value
- $27 (Estimate, Sep 2026)
- Used value
- $25
- Retirement
- Retired
Locomotive Blue Bricks value by year
From $14 in 2016 to $27 (Estimate, Sep 2026): +96%. Its highest year was 2021, at $30.
| Year | Value | Change |
|---|---|---|
| Estimate, Sep 2026 | $27 | +34.9% |
| 2026 (so far) | $20 | +1.2% |
| 2025 | $20 | +5.2% |
| 2024 | $19 | −3.0% |
| 2023 | $19 | −15.1% |
| 2022 | $23 | −25.0% |
| 2021 | $30 | +22.0% |
| 2020 | $25 | +58.5% |
| 2019 | $16 | +3.2% |
| 2018 | $15 | +2.6% |
| 2017 | $15 | +9.2% |
| 2016 | $14 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Locomotive Blue Bricks (3743-1) worth?
LEGO Locomotive Blue Bricks is worth approximately $27 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Locomotive Blue Bricks retired?
Yes — Locomotive Blue Bricks (3743-1) 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 Locomotive Blue Bricks gone up in value?
Yes. Locomotive Blue Bricks launched at $7 and now trades around $27, an increase of 278.9%. See the price history chart for how it got there.
What is the price per piece for Locomotive Blue Bricks?
At its $7 retail price across 106 pieces, Locomotive Blue Bricks works out to about $0.066 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Locomotive Blue Bricks a good investment?
Locomotive Blue Bricks currently trades 278.9% above its $7 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 Locomotive Blue Bricks so expensive?
Locomotive Blue Bricks was released in 2001 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.