like paysafe cards or something,this would get you some costumers who want to pay anonymously, or don't have Paypal or a bank account for some reason i would appreciate it because i don't always want to thirds know what i buy(if i buy such a card, the seller doesn't even knows my name, and he will definetly forget my face in the next 3 hours)
if it is a prepaid visa or mastercard you can probably use it. When you click the buy it now button, you will be taken to paypal, and there should be an option to pay by card without signing up for a paypal account.