Foster's Home for Imaginary Friends S05 E02 The Buck Swaps Here

The gang goes to a swap meet where a pick-pocketer is stealing money. He accidentally loses a $100 bill that Eduardo finds. Eduardo takes his money around the swap meet, looking for something to buy. But even the most sensible of the gang are tempted by the bill, and with the thief also trying to catch his bill, craziness ensues.