I want to buy some blu-ray movies from buy.com but it seems that the google checkout only works the first time customers. I have never done a google checkout but the $10 discount sounds sweet. how can i get more discounts (if possible)? I read somewhere that I must change my e-mail if I would want to get another $10 off. Can someone confirm this? Must I change my debit/credit card and name as well? I need as much info on this, please help me.