The VDR classifieds and store uses Paypal as the payment processor. You don't need a Paypal account to pay, you can use a credit or debit card.
When the system takes you to PayPal, you are offered a sign in screen. At the top is the normal email and password, under that is a link for Use Credit or Debit Card (or something similar). (I'll try to get a screen shot for this process. )