Set prices › Architecture › 521-9
LEGO® 1 x 1 and 1 x 2 Plates (Architectural Hobby and Model Building Supplemental Set) 521-9
Prices updated Oct 8, 2026, 23:30 UTC.
Price history
Monthly average of real sales, in USD at today's exchange rate.
What is LEGO 1 x 1 and 1 x 2 Plates (Architectural Hobby and Model Building Supplemental Set) 521-9 worth?
A new, sealed 1 x 1 and 1 x 2 Plates (Architectural Hobby and Model Building Supplemental Set) (521-9) sold for $39.16 on average over the last six months, across 1 sales. LEGO no longer sells it in the US, so collectors set the price.
Set facts
- Set number
- 521-9
- Pieces
- 82
- Released
- 1962
- Theme
- Architecture
- Price per piece
- $0.48
- Status
- Retired
Questions
Is LEGO 521-9 1 x 1 and 1 x 2 Plates (Architectural Hobby and Model Building Supplemental Set) retired?
Yes. LEGO no longer sells 1 x 1 and 1 x 2 Plates (Architectural Hobby and Model Building Supplemental Set) in the US, so its value now comes from what collectors pay for it: $39.16 new on average over the last six months.
How are these prices calculated?
Values are quantity-weighted averages of real sales of the set over the last six months, updated every night. LEGO retail prices come from Brickset. Other currencies are converted at the European Central Bank's daily rate.
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