In 2013, LEGO released 2 Duplo Building Sets sets, all of these sets have been retired. For that year, the total price of all retail sets cost $50, today those sets are valued around $431, a growth of 762%.
Most valuable 2013 LEGO Duplo Building Sets set
10555 Creative Bucket $332.53
Most owned 2013 Duplo Building Sets set
10561 Toddler Starter Building Set
2 sets

10555 Creative Bucket

Theme / Subtheme Duplo / Building Sets
Year 2013
Pieces 65
Availability Retired
10555 LEGO Duplo Creative Bucket
Retail $29.99
Value $332.53
Growth  +1008.8%
Annual growth 20.5%

10561 Toddler Starter Building Set

Theme / Subtheme Duplo / Building Sets
Year 2013
Pieces 37
Availability Retired
10561 LEGO Duplo Toddler Starter Building Set
Retail $19.99
Value $98.34
Growth  +391.9%
Annual growth 8.6%