In 2021, LEGO released 8 Ideas sets across 2 subthemes, all of these sets have been retired. Subthemes for that year included Licensed and Promotional. For that year, the total price of all retail sets cost $1,030, today those sets are valued around $1,391, a growth of 35%.
Most valuable 2021 LEGO Ideas set
21330 Home Alone $322.08
Highest growth 2021 Ideas set
21328 Seinfeld +92.71%
Most owned 2021 Ideas set
21325 Medieval Blacksmith
8 sets

21325 Medieval Blacksmith

Theme Ideas
Year 2021
Pieces / Minifigs 2,164 / 4
Availability Retired
21325 LEGO Ideas Medieval Blacksmith
Retail $179.99
Value $188.81
Growth  +4.9%
Annual growth 4.1%

21326 Winnie the Pooh

Theme / Subtheme Ideas / Licensed
Year 2021
Pieces / Minifigs 1,265 / 5
Availability Retired
21326 LEGO Ideas Winnie the Pooh
Retail $99.99
Value $169.95
Growth  +70.0%
Annual growth 21.4%

21327 Typewriter

Theme Ideas
Year 2021
Pieces 2,079
Availability Retired
21327 LEGO Ideas Typewriter
Retail $249.99
Value $315.00
Growth  +26.0%
Annual growth 14.2%

21328 Seinfeld

Theme / Subtheme Ideas / Licensed
Year 2021
Pieces / Minifigs 1,326 / 5
Availability Retired
21328 LEGO Ideas Seinfeld
Retail $79.99
Value $154.15
Growth  +92.7%
Annual growth 19.4%

21329 Fender Stratocaster

Theme / Subtheme Ideas / Licensed
Year 2021
Pieces 1,074
Availability Retired
21329 LEGO Ideas Fender Stratocaster
Retail $119.99
Value $189.99
Growth  +58.3%
Annual growth 30.0%

21330 Home Alone

Theme / Subtheme Ideas / Licensed
Year 2021
Pieces / Minifigs 3,955 / 5
Availability Retired
21330 LEGO Ideas Home Alone
Retail $299.99
Value $322.08
Growth  +7.4%

40448 Vintage Car

Theme / Subtheme Ideas / Promotional
Year 2021
Pieces / Minifigs 189 / 2
Availability Retired
40448 LEGO Ideas Vintage Car
promotional
Value $25.99
Annual growth 37.3%

40487 Sailboat Adventure

Theme / Subtheme Ideas / Promotional
Year 2021
Pieces / Minifigs 330 / 2
Availability Retired
40487 LEGO Ideas Sailboat Adventure
promotional
Value $25.22
Annual growth 39.3%