well you go to the link of the comp and scroll down to the bottom. you make sure it is what you want to buy and put in the amount you want to spend on it (there will be a greyed out number in the box; you have to spend at least the amount that is shown there – or more if you want to. you have to manually put in a number though; the greyed out number is just the suggestion)
there will be a button on the following site where you can change whether you want to buy it via paypal or via credit card. both options will be discrete as far as people have told me.
hope that helps?
Cyberrat Writes 