Super Soaker
Average original price: $10-50
Potential earnings: $600
Children in the ’90s and early 2000s used these high-pressure water guns on hot summer days. The price of them ranged from $10-$50, depending on the water gun’s size and abilities. As time went by, Super Soakers have become more advanced and technical to the point it was no longer fun to play with them. However, the original water gun can sell for $600 if it’s still in good condition.