In 2008, LEGO released 3 Exclusive sets across 3 subthemes, all of these sets have been retired. Subthemes for that year included Employee Gift, FIRST LEGO League, and Minifigure Collection. For that year, the total price of all retail sets cost $93, today those sets are valued around $1,124, a growth of 1108%.
Most valuable 2008 LEGO Exclusive set 2008 Heart $690.05