In 2008, LEGO released 3 SpongeBob SquarePants sets, all of these sets have been retired. For that year, the total price of all retail sets cost $80, today those sets are valued around $757, a growth of 846%.
Most valuable 2008 SpongeBob SquarePants set
3831 Rocket Ride $359.49
Most owned 2008 SpongeBob SquarePants set
3830 The Bikini Bottom Express
3 sets

3830 The Bikini Bottom Express

Theme SpongeBob SquarePants
Year 2008
Pieces / Minifigs 210 / 3
Availability Retired
3830 LEGO SpongeBob SquarePants The Bikini Bottom Express
Retail $19.99
Value $200.00
Growth  +900.5%
Annual growth 9.1%

3831 Rocket Ride

Theme SpongeBob SquarePants
Year 2008
Pieces / Minifigs 279 / 3
Availability Retired
3831 LEGO SpongeBob SquarePants Rocket Ride
Retail $29.99
Value $359.49
Growth  +1098.7%
Annual growth 9.1%

3832 The Emergency Room

Theme SpongeBob SquarePants
Year 2008
Pieces / Minifigs 236 / 3
Availability Retired
3832 LEGO SpongeBob SquarePants The Emergency Room
Retail $29.99
Value $197.01
Growth  +556.9%
Annual growth 8.2%