6. Super Soaker
AVERAGE OG PRICE: $10-50
MIGHT FLIP FOR: $60
Gun fights have always fascinated children, especially boys, for generation. These fights are even more interesting when they are harmless, and this is where the creators of Super Soak saw an opportunity. This toy water gun operates using manually pressurized air to shoot water at your friends, mom, dad, neighbor, etc. It was the joy of many little kids, especially during summertime, much to the annoyance of many parents. Its popularity generated more than $1 billion in total sales.
Complex said the Monster XL and the original model, Super Soaker 50, were in highest demand on eBay in 2015. Demand might be different right now for particular Super Soakers. If you sell the right water gun at the right time, you could look at a tidy sum.