In 1969, LEGO released 2 Universal Building Set Supplemental sets, all of these sets have been retired. For that year, the total price of all retail sets cost $9, today those sets are valued around $261, a growth of 2966%.
Most valuable 1969 Universal Building Set Supplemental set
990-2 Trees and Signs $180.91
Largest 1969 Universal Building Set Supplemental set
103 4.5V Motor Set with Rubber Tracks 32 pieces
Theme / Subtheme Universal Building Set / Supplemental
Year 1969
Pieces 32
Availability Retired
103 LEGO 4.5V Motor Set with Rubber Tracks
Retail $7.25
Value $79.69
Growth  +999.2%
Annual growth 7.4%
Theme / Subtheme Universal Building Set / Supplemental
Year 1969
Pieces 13
Availability Retired
990-2 LEGO Trees and Signs
Retail $1.25
Value $180.91
Growth  +14372.8%
Annual growth 9.5%