Those familiar with groupon site and concept probably understand what I need. For the rest of you, I need following feature - when user clicks "buy" on the site I want just to reserve that amount on his card for 24h. Not charge it, but reserve so that I'm sure he has that amount of money and can't spend it on something else in the next 24h. After 24h I want to have option to either let go that reserve lock (cancel it) or charge card. can somebody please tell me is this possible to do with 2checkout or some other payment system / card processor (besides paypal) that is available in europe