Update from 2016 summer:
If you have PayPal account please, follow the PayPal login process.
If you haven’t got PayPal account, please choose the “Pay with a debit or credit card” or “Check Out as a Guest” menu.
Budapest Minibus Payment – Log in or pay credit card
Fill the form
After the pay, please check your email and bank account! The Transcaction ID is very important!
Old paypal version: