Check your best buy gift card balance online in any United States, Visit any best buy retail location and ask a cashier to check the balance for you. You can call 1-888-716-7994 and ask for your available balance. To check online your BestBuy gift card balance, you will need the 16-digit best buy gift card numbers and 4-digit PIN located at the back of the card. Best Buy Gift Card Balance Best Buy Gift Card Bestbuy Gift Card Balance Bestbuy Gift Card Check Best Buy Gift Card Balance Best Buy Check Gift Card Balance Best Buy Gift Card Balance Check