Ok, I spoke too soon on that last review. The second purchase was easy. :)

Easy, but what if a person wants to buy more than one certificate? Then they have to go through the whole process again (minus the credit card if they stored it, I know.) Or did I miss something? Maybe have a button that says "buy more certificates" and sends them back to the page. Or maybe have a place where you can enter numbers so people like me who are buying for ourselves can just enter the number they want. Just a suggestion, since I'm guessing you want to sell as much as you can. :)