In 2012, LEGO released 2 Seasonal Easter sets, all of these sets have been retired. For that year, the total price of all retail sets cost $10, today those sets are valued around $28, a growth of 185%.
Most valuable 2012 LEGO Seasonal Easter set
40030 Duck with Ducklings $18.41
Largest 2012 LEGO Seasonal Easter set
40031 Bunny and Chick 52 pieces
2 sets

40030 Duck with Ducklings

Theme / Subtheme Seasonal / Easter
Year 2012
Pieces 51
Availability Retired
40030 LEGO Easter Duck with Ducklings
Retail $4.99
Value $18.41
Growth  +268.9%
Annual growth 8.8%

40031 Bunny and Chick

Theme / Subtheme Seasonal / Easter
Year 2012
Pieces 52
Availability Retired
40031 LEGO Easter Bunny and Chick
Retail $4.99
Value $10.03
Growth  +101.0%
Annual growth 5.7%