American Girl Dolls
One can now purchase an American Girl Doll for around $100, but you may want to keep them in mint condition as they could be worth a lot of money in time. Special items such as the molly McIntire edition grant sellers around $1000 at auctions. Incredibly, your American Girl Doll needs to have retired before you can hope to make a big sale from it, which means that valuable items are difficult to locate. Once yours hits the rare age group, it is time to cash in!
Video Game Cartridges
Too many people mindlessly sell vintage video game cartridges in yard sales, unaware of what they are virtually giving away, such as Atari or Sega SNES cartridges. If you happen to still have the video games of your childhood, try getting them valued through eBay and the like. These are rare and expensive games, such as The River Patrol, which sold on eBay in 2019 for $675! So, get all your games from the 90s (and 80s) together and you may have a small fortune on your hands.