Payments are currently accepted and secured exclusively through PayPal.
Please note this doesn't require having a PayPal account! Just select the "Pay with Debit or Credit Card" option after pressing "Buy Now" on the Payment Options page during checkout, using a PayPal Guest account.
Credit cards accepted by PayPal for this are: MasterCard, Discover, American Express, and Visa.
Depending on which state you're located in, there could also be a tax applied for eCommerce purchase.