In 2019, LEGO released 6 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 $533, today those sets are valued around $684, a growth of 28%.
Most valuable 2019 LEGO Ideas set
21318 Treehouse $229.99
Highest growth 2019 Ideas set
40335 Space Rocket Ride +103.85%
Most owned 2019 Ideas set
21319 Central Perk
6 sets

21316 The Flintstones

Theme / Subtheme Ideas / Licensed
Year 2019
Pieces / Minifigs 748 / 4
Availability Retired
21316 LEGO Ideas The Flintstones
Retail $59.99
Value $95.31
Growth  +58.9%
Annual growth 8.4%

21317 Steamboat Willie

Theme / Subtheme Ideas / Licensed
Year 2019
Pieces / Minifigs 751 / 2
Availability Retired
21317 LEGO Ideas Steamboat Willie
Retail $89.99
Value $133.42
Growth  +48.3%
Annual growth 6.9%

21318 Treehouse

Theme Ideas
Year 2019
Pieces / Minifigs 3,036 / 4
Availability Retired
21318 LEGO Ideas Treehouse
Retail $249.99
Value $229.99

21319 Central Perk

Theme / Subtheme Ideas / Licensed
Year 2019
Pieces / Minifigs 1,070 / 7
Availability Retired
21319 LEGO Ideas Central Perk
Retail $59.99
Value $103.60
Growth  +72.7%
Annual growth 15.0%

21320 Dinosaur Fossils

Theme Ideas
Year 2019
Pieces / Minifigs 910 / 2
Availability Retired
21320 LEGO Ideas Dinosaur Fossils
Retail $59.99
Value $94.98
Growth  +58.3%
Annual growth 10.2%

40335 Space Rocket Ride

Theme / Subtheme Ideas / Promotional
Year 2019
Pieces / Minifigs 154 / 1
Availability Retired
40335 LEGO Ideas Space Rocket Ride
Retail $12.99
Value $26.48
Growth  +103.8%
Annual growth 10.2%