Which credit cards may I use to purchase SB? Follow You may use any valid Visa, MasterCard, American Express, Discover, JCB, Discover, EnRoute, eCheck.net, PayPal, Diners Club credit/debit card. Related articles Are SB purchases reversible or refundable? How long will it take for SB to be posted to my account? Will my SB ever expire? How do I purchase SB? How much do SB cost? Is there tax?