LEGO 520 2x2 Plates is a vintage Classic set from 1962 valued at $46 for new and sealed sets, up 9004% from an original retail price of $0.50. Annual appreciation has averaged 6.15% since release. Used copies are valued between $22 and $27 depending on condition.
LEGO 520-3 2x2 Plates is a Classic Supplemental set released in 1962, containing 42 pieces. This architectural “hobby und modelbau” version is an early supplemental parts pack centered on 2 x 2 plates, with known color assortments including black, blue, light gray, red, trans-clear, white, and yellow. Copies were packaged in a trans-clear storage container with an outer sleeve, and the set was issued with two different box sleeve variations. Surviving examples indicate that the included 2 x 2 plates could vary by production version, with black, blue, or light gray among the documented primary plate colors.
A new and sealed 2x2 Plates is currently valued at around $46, with annual growth of approximately 6%. The average used price is $23 for those in good overall condition. Based on current trends, this set could be valued near $48 within the next year.