On: Ask HN: What's the best way to accept credit cards online?

[aneesh]

Short answer: There's no free lunch here. Whoever processes credit cards for you will take a small cut.

Long answer: See the following discussions

http://news.ycombinator.com/item?id=470128

http://news.ycombinator.com/item?id=389692

http://news.ycombinator.com/item?id=115723

http://news.ycombinator.com/item?id=12010

Also, if you store your customers' credit card information, you have to do implement all sorts of access & privacy controls, a ritual otherwise known as PCI compliance. You probably don't want to go through all that trouble.