Selling Pokémon cards is a legal way to make extra money. A very popular franchise, Pokémon has worldwide market of fans and generates $1.5 billion in revenue every year, as of 2015.
One of the easiest ways to make money from Pokémon cards is to visit a website that buys cards directly from collectors, such as Troll & Toad. Selling cards with these sites is as simple as making the deal, sending your cards in the mail and later receiving cash for them.
Collectors who want to try and make a little more money can post Pokémon cards on eBay, where collectors can find plenty of how-to guides for selling their cards.