Top Deals on Gift Cards - Best Buy Not a credit or debit card. Not valid as payment on a Best Buy Credit Card. Check gift card balance at any U.S. and Puerto Rico Best Buy retail locations, online at BestBuy.com, or call 1-888-716-7994. Must have card number available. An e-gift card may be available for reference in BestBuy.com accounts in the order details section of your account.