OttoFrei.com accepts payments via PayPal at checkout. When you reach the payment page select PayPal and when you press continue you will be taken to PayPal to submit your information.
When you finish on PayPal.com and return to the payment page on OttoFrei.com your payment option might revert back to Credit Card. Don't worry your progress was not lost! Please reselect PayPal from the menu and then press continue. We apologize for this inconvenience. We have a fix for this bug coming in the next website update.