In 2014, LEGO released 4 Creator Promotional sets, all of these sets have been retired. For that year, the total price of all retail sets cost $5, today those sets are valued around $59, a growth of 1086%.
Most valuable 2014 LEGO Creator Promotional set
40109 MINI Cooper Mini Model $24.19
Highest growth 2014 Creator Promotional set
40108 Balloon Cart +359.12%
4 sets

30188 Cute Kitten

Theme / Subtheme Creator / Promotional
Year 2014
Pieces 54
Availability Retired
30188 LEGO Creator Cute Kitten
promotional
Value $7.83
Annual growth 3.5%

30189 Transport Plane

Theme / Subtheme Creator / Promotional
Year 2014
Pieces 49
Availability Retired
30189 LEGO Creator Transport Plane
promotional
Value $4.26
Annual growth 2.5%

40108 Balloon Cart

Theme / Subtheme Creator / Promotional
Year 2014
Pieces / Minifigs 66 / 2
Availability Retired
40108 LEGO Creator Balloon Cart
Retail $4.99
Value $22.91
Growth  +359.1%
Annual growth 7.9%

40109 MINI Cooper Mini Model

Theme / Subtheme Creator / Promotional
Year 2014
Pieces 59
Availability Retired
40109 LEGO Creator MINI Cooper Mini Model
promotional
Value $24.19
Annual growth 5.0%