I just tried to pick up a couple of buy-it-now items, and apparently there is NO DEFAULT OPTION for using a credit card to do that sort of thing. If the buyer can’t take a credit card, it’s PayPal* or nothing. Which is… how they do business, apparently; but I’m kind of surprised that eBay isn’t in the credit card processing business. There’s money in it.
*Obligatory Filthy Lucre button: