In 2009, LEGO released 2 SpongeBob SquarePants sets, all of these sets have been retired. For that year, the total price of all retail sets cost $65, today those sets are valued around $598, a growth of 821%.
Most valuable 2009 SpongeBob SquarePants set
3834 Good Neighbours at Bikini Bottom $322.19
Highest growth 2009 SpongeBob SquarePants set
3833 Krusty Krab Adventures +1005.48%
2 sets

3833 Krusty Krab Adventures

Theme SpongeBob SquarePants
Year 2009
Pieces / Minifigs 209 / 3
Availability Retired
3833 LEGO SpongeBob SquarePants Krusty Krab Adventures
Retail $24.99
Value $276.26
Growth  +1005.5%
Annual growth 12.1%

3834 Good Neighbours at Bikini Bottom

Theme SpongeBob SquarePants
Year 2009
Pieces / Minifigs 425 / 3
Availability Retired
3834 LEGO SpongeBob SquarePants Good Neighbours at Bikini Bottom
Retail $39.99
Value $322.19
Growth  +705.7%
Annual growth 9.9%