Selling games

What is the best way to sell a program on a website without having to pay monthly for the service?
(paypal,share-it,etc.)

Probably Plimus or BMT Micro. Both are good value and offer excellent features. I had a very bad experienced with BMT which is the only reason I use Plimus. I suspect my bad experience with BMT was a glitch though, since others seem very happy with them. Feature and price-wise, there doesn't seem to be much between them.