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 $662, a growth of 391%.
Most valuable 2014 LEGO Ideas set
21104 NASA Mars Science Laboratory Curiosity Rover $383.70
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 $383.70
Growth  +1179.4%
Annual growth 14.6%

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 $146.46
Growth  +193.0%
Annual growth 13.2%

21109 Exo-Suit

Theme Ideas
Year 2014
Pieces / Minifigs 321 / 2
Availability Retired
21109 LEGO Ideas Exo-Suit
Retail $34.99
Value $87.17
Growth  +149.1%
Annual growth 9.7%

21110 Research Institute

Theme / Subtheme Ideas / Scientific
Year 2014
Pieces / Minifigs 165 / 3
Availability Retired
21110 LEGO Ideas Research Institute
Retail $19.99
Value $45.00
Growth  +125.1%
Annual growth 5.7%