Here are 5 easy & legit ways to turn your gift cards into cash:1. Plus, if you’re just interested in trading your gift cards, you can even receive up to 7% more! Gift Card Granny ensures they’ll offer you the highest payout for your gift cards. But note that this only works for prepaid cards and will not work for store or brand gift cards. It’s helpful to know the exact amount left on each of your cards so redeeming your unused prepaid cards is easier.