You know those old McDonald's Happy Meal toys that are just laying around? You could be making some big money off of them and you probably didn't even know it. According to LoveAntiques.com, the mini Potato Heads Kids from 1987 could get you $120. Remember those Beanie Babies from 2000? Those are getting $400. Now just because some are worth a good amount of money, not all toys from back in the day are worth that much. Most listings for the toys are on eBay, so check it out for yourself before thinking you're gonna get a big payday.