LEGO Curved and Round Bricks (The Building Toy) 423-3
LEGO Curved and Round Bricks (The Building Toy) (423-3) is estimated at about $28 sealed as of Sep 2026. Retired · 28 pieces · 1966 System.
- Set number
- 423-3
- Theme
- System
- Subtheme
- Supplemental
- Year
- 1966
- Pieces
- 28
- Minifigures
- 0
- Market value
- $28 (Estimate, Sep 2026)
- Used value
- $11
- Retirement
- Retired
Frequently asked questions
How much is LEGO Curved and Round Bricks (The Building Toy) (423-3) worth?
LEGO Curved and Round Bricks (The Building Toy) is worth approximately $28 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Curved and Round Bricks (The Building Toy) retired?
Yes — Curved and Round Bricks (The Building Toy) (423-3) 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 Curved and Round Bricks (The Building Toy) so expensive?
Curved and Round Bricks (The Building Toy) was released in 1966 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.