Whether you buy your games from the Nintendo eShop, Xbox Live, the PlayStation Store, Steam, or even GameStop, you can save 10% when you buy $100 or more worth of gift cards from eBay. The cards all come in $50 increments, so you can buy two or more of the same, or mix and match to get the deal. Just note that you’ll have to pay with PayPal to see the discount at checkout.