In 2014, LEGO released 4 Ideas sets across 3 subthemes, all of these sets have been retired. Subthemes for that year included Licensed, NASA, and Scientific. For that year, the total price of all retail sets cost $135, today those sets are valued around $647, a growth of 379%.
Most valuable 2014 LEGO Ideas set
21104 NASA Mars Science Laboratory Curiosity Rover $342.95
Largest 2014 LEGO Ideas set
21108 Ghostbusters Ecto-1 508 pieces
4 sets

21104 NASA Mars Science Laboratory Curiosity Rover

Theme / Subtheme Ideas / NASA
Year 2014
Pieces 295
Availability Retired
21104 LEGO Ideas NASA Mars Science Laboratory Curiosity Rover
Retail $29.99
Value $342.95
Growth  +1043.5%
Annual growth 13.5%

21108 Ghostbusters Ecto-1

Theme / Subtheme Ideas / Licensed
Year 2014
Pieces / Minifigs 508 / 4
Availability Retired
21108 LEGO Ideas Ghostbusters Ecto-1
Retail $49.99
Value $169.38
Growth  +238.8%
Annual growth 13.1%

21109 Exo-Suit

Theme Ideas
Year 2014
Pieces / Minifigs 321 / 2
Availability Retired
21109 LEGO Ideas Exo-Suit
Retail $34.99
Value $90.00
Growth  +157.2%
Annual growth 8.9%

21110 Research Institute

Theme / Subtheme Ideas / Scientific
Year 2014
Pieces / Minifigs 165 / 3
Availability Retired
21110 LEGO Ideas Research Institute
Retail $19.99
Value $44.71
Growth  +123.7%
Annual growth 5.6%