In the end I had to call to my friend if he can buy it with his credit card and I transfer money to his account. He found the product and it was still under 600eur. But to buy he had to make indiegogo account. He made but there came no option to change email address to mine so that I would receive shipment info. So log out and log in with my account. He did. But the price had rose again with 35eur. But after some hassling I finally got it purchased (contribution order). After he had paid he went back to the page and said oops. There was still the cheaper perk available but he just missed it before. So I supported the campaign with extra 35eur.