I bought my 1st gen iPod touch brand new on eBay in August and it has a lot of problems. It has very poor battery life (I have to charge 3+ times a day), WiFi doesn't connect to my router sometimes, and it freezes constantly. Luckily, it is still under warranty until 2009 and I was wondering if Apple will exchange it for a different one if I go to one of their stores. I'm kind of worried that they'll ask for a proof of purchase. I don't have a proof of purchase since I bought it on eBay. Any help would be appreciated!