A Captain Voltage Figurine is a figurine of Captain Voltage, most likely the protagonist of a comic series.
Nate Wright once bought one using borrowed money from a yard sale for $10, although when he tried to sell it late he realized that they actually cost $2. According to Wayne, they are pretty common. Nate then tried to sell it for $15 to pay Francis Pope back the $10 he borrowed. Francis said he needed the money to get his grandma a birthday gift but then Nate said "Grammy will get her gift."