In 2005, LEGO released 2 Seasonal sets in the subtheme Easter, all of these sets have been retired. For that year, the total price of all retail sets cost $8, today those sets are valued around $16, a growth of 96%.
Most valuable 2005 LEGO Seasonal set
10169 Chicken & Chicks $8.00
Largest 2005 LEGO Seasonal set
10168 Mrs. Bunny 61 pieces
2 sets

10168 Mrs. Bunny

Theme / Subtheme Seasonal / Easter
Year 2005
Pieces 61
Availability Retired
10168 LEGO Easter Mrs. Bunny
Retail $3.99
Value $7.62
Growth  +91.0%
Annual growth 3.4%

10169 Chicken & Chicks

Theme / Subtheme Seasonal / Easter
Year 2005
Pieces 57
Availability Retired
10169 LEGO Easter Chicken & Chicks
Retail $3.99
Value $8.00
Growth  +100.5%
Annual growth 5.3%