Buying Thru Amazon

I've been thinking about buying one or two stories that used to be here, but are now only available through Amazon.

The issue I'm having is that Amazon is asking for either credit cards or gift cards/promotional codes to buy them.

I have no credit card, so that's not possible. I've seen some gift cards, just wondering is there any other way to buy these books?

It seems quite odd that there's no option to pay directly from a site such as PayPal or something similar. At least, I haven't seen one.