In the '90s, most of us were busy hoarding Beanie Babies in hopes they would pay for our college education once they increased in value. That totally backfired, but another '90s toy hidden in the depths of our childhood bedrooms can actually be worth a boatload. Some rare Pokémon cards can easily pay for your college loans.

The Pokémon Trading Card Game is arguably one of the most fun and original card games of the last few decades. Throughout the years, Pokémon has done its best to make these little pieces of paper extremely limited - and some efforts have resulted in outrageous prices nowadays.

The rarest cards were given to a select few master trainers who won tournaments, but you may actually have some of the most expensive Pokémon cards in your regular collection. Factory errors also occurred, from the base set first edition misprint to free promotional movie cards that didn't come out as planned. These are among the rarest Pokémon cards in the bunch.

On the trading circuit, Pokémon cards receive a Professional Sports Authenticator (PSA) number. Number 10 is complete mint condition and will potentially increase the value of your Pokémon cards by thousands. However, if your card's PSA falls below a 7, it dramatically decreases in value. In August 2019, for example, a 103-piece set of Mint 10 condition cards including a first edition Charizard sold for $107,010 at auction. Each of the cards is considered rare, which proves their increasing value is unrelenting.

Do you have a secret goldmine hidden in your grade school backpack? There's only one way to find out. These are the Pokémon cards that cost the most money.