In 2014, LEGO released 2 Friends Promotional sets, all of these sets have been retired. For that year, the total price of all retail sets cost $2, today those sets are valued around $15, a growth of 674%.
Most valuable 2014 LEGO Friends Promotional set
5002113 Beach Hammock $8.61
Highest growth 2014 Friends Promotional set
5002112 Bracelets +241.71%
2 sets

5002112 Bracelets

Theme / Subtheme Friends / Promotional
Year 2014
Pieces 20
Availability Retired
5002112 LEGO Friends Bracelets
Retail $1.99
Value $6.80
Growth  +241.7%
Annual growth 10.8%

5002113 Beach Hammock

Theme / Subtheme Friends / Promotional
Year 2014
Pieces 29
Availability Retired
5002113 LEGO Friends Hammock
promotional
Value $8.61
Annual growth 6.8%