In 2012, LEGO released 3 Duplo Cars sets, all of these sets have been retired. For that year, the total price of all retail sets cost $75, today those sets are valued around $191, a growth of 154%.
Most valuable 2012 LEGO Duplo Cars set
6134 Siddeley Saves The Day $73.55
Highest growth 2012 Duplo Cars set
6132 Red +385.99%
3 sets

6132 Red

Theme / Subtheme Duplo / Cars
Year 2012
Pieces 13
Availability Retired
6132 LEGO Duplo Cars Red
Retail $14.99
Value $72.85
Growth  +386.0%
Annual growth 6.8%

6133 Race Day

Theme / Subtheme Duplo / Cars
Year 2012
Pieces 26
Availability Retired
6133 LEGO Duplo Cars Race Day
Retail $24.99
Value $44.36
Growth  +77.5%
Annual growth 3.0%

6134 Siddeley Saves The Day

Theme / Subtheme Duplo / Cars
Year 2012
Pieces 34
Availability Retired
6134 LEGO Duplo Cars Siddeley Saves The Day
Retail $34.99
Value $73.55
Growth  +110.2%
Annual growth 3.8%