In 2015, 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 $85, today those sets are valued around $273, a growth of 222%.
Most valuable 2015 LEGO Duplo Building Sets set
10622 Large Creative Box $165.16
Highest growth 2015 Duplo Building Sets set
10618 Creative Building Box +332.69%
2 sets

10618 Creative Building Box

Theme / Subtheme Duplo / Building Sets
Year 2015
Pieces / Duplo figures 70 / 2
Availability Retired
10618 LEGO Duplo Creative Building Box
Retail $24.99
Value $108.13
Growth  +332.7%
Annual growth 9.7%

10622 Large Creative Box

Theme / Subtheme Duplo / Building Sets
Year 2015
Pieces / Duplo figures 193 / 2
Availability Retired
10622 LEGO Duplo Large Creative Box
Retail $59.99
Value $165.16
Growth  +175.3%
Annual growth 8.4%