Nerf Turbo Screamer
Average original price: $12
Potential price: $100
Every kid in the ’90s wanted to buy this whistling Nerf ball for $12. These days, it’s very hard to find it in stores, and people are willing to pay $100 to buy a Nerf Turbo Screamer. Some bids on eBay reach a pretty penny for it, so if you still have one from your childhood and aren’t planning to give it to your child, then you can make some quick money by selling it online. Nowadays, not many kids would be interested in one of these, anyway.