I'm trying to decide if I should give my friend my iphone when I get my new 3G. Or if I should sell the older iphone, given the great prices they seem to be selling for on ebay, and simply buy her a new 3G phone with the money. She's not currently on AT&T - she'll be signing up as a new customer. What's everyone think? What's the best way to do this? What would you do?