In 1970, LEGO released 2 Duplo Basic Set sets, all of these sets have been retired. For that year, the total price of all retail sets cost $4, today those sets are valued around $69, a growth of 1840%.
Most valuable 1970 LEGO Duplo Basic Set set
513 Building Set $43.83
Highest growth 1970 Duplo Basic Set set
512 Building Set +1899.20%
Theme / Subtheme Duplo / Basic Set
Year 1970
Pieces 20
Availability Retired
512 LEGO Duplo Building Set
Retail $1.25
Value $24.99
Growth  1899.2%
Annual growth 5.7%
Theme / Subtheme Duplo / Basic Set
Year 1970
Pieces 29
Availability Retired
513 LEGO Duplo Building Set
Retail $2.49
Value $43.83
Growth  1660.2%
Annual growth 5.5%