$5

@lostnuggets + PayPal

I've been using this one for a long time and it's really good. The website/service is great since you can save your credit/debit card info on it and link it to your bank-- and then use it as a buffer between you and other sites. It'll provide your shipping address/payment info for pretty much any site that accepts MasterCard/doesn't have their own payment/financing scheme going. It's also great for receiving payments and most rewards programs can payout to it.