If you prefer to use your credit card for payment, and not sign up for a PayPal account -
After registering and entering your personal info, or after logging in (if you already have an account), scroll down to the bottom of the page and you will see:
Prefer to pay with Credit Card or Debit Card (instead of PayPal)... click this link "Pay with Credit/Debit Card" and scroll down to "Pay with Debit or Credit Card".
Click the "Pay with Credit/Debit Card" link. On the next page, scroll down and click "Pay with Debit or Credit Card". Now you can pay with your credit/debit card and you won't have to sign up for a PayPal account.