First everything they said before this is the right way and the best way. BUT the easiest way to do what your asking is to make the sales page and HOPE it makes them swipe their card although it is not as easy as it sounds, that's why Lisa is totally correct in a content first site, but the easy way is to create the sales page make a buy now button through paypal and after they swipe the card it sends them to a thank you page and on that page you have links set up to your content pages..You have to instruct them to save the URL of the thank you page..

Bung-Yow