In 2018, LEGO released 5 BrickHeadz Seasonal sets, all of these sets have been retired. For that year, the total price of all retail sets cost $60, today those sets are valued around $90, a growth of 51%.
Most valuable 2018 LEGO BrickHeadz Seasonal set
40274 Mr. & Mrs. Claus $29.00
Highest growth 2018 BrickHeadz Seasonal set
40273 Turkey +71.17%
5 sets

40270 Valentine's Bee

Theme / Subtheme BrickHeadz / Seasonal
Year 2018
Pieces 140
Availability Retired
40270 LEGO BrickHeadz Valentine's Bee
Retail $9.99
Value $16.85
Growth  +68.7%
Annual growth 6.4%

40271 Bunny

Theme / Subtheme BrickHeadz / Seasonal
Year 2018
Pieces 126
Availability Retired
40271 LEGO BrickHeadz Bunny
Retail $9.99
Value $13.30
Growth  +33.1%
Annual growth 5.5%

40272 Witch

Theme / Subtheme BrickHeadz / Seasonal
Year 2018
Pieces 151
Availability Retired
40272 LEGO BrickHeadz Witch
Retail $9.99
Value $14.03
Growth  +40.4%
Annual growth 5.5%

40273 Turkey

Theme / Subtheme BrickHeadz / Seasonal
Year 2018
Pieces 114
Availability Retired
40273 LEGO BrickHeadz Turkey
Retail $9.99
Value $17.10
Growth  +71.2%
Annual growth 7.2%

40274 Mr. & Mrs. Claus

Theme / Subtheme BrickHeadz / Seasonal
Year 2018
Pieces 341
Availability Retired
40274 LEGO BrickHeadz Mr. & Mrs. Claus
Retail $19.99
Value $29.00
Growth  +45.1%
Annual growth 6.5%