I'm planning on doing an early upgrade with AT&T when the new iPhone 5 comes out, specifically the 32GB model, which means I will be paying $299+$250=$549. I'm going to sell my current 4S to help defray some of the cost. The phone is in great condition, save a small chip to some of the plasic in the upper corner of the screen near the glass (which incidentally is completely covered by the bumper I have on the phone), and otherwise is in great looking physical and working condition. I have two questions: 1) How much do you reasonably think I'll be able to get for the phone via Ebay? I'm hoping for $300, but I wasn't sure if that was realistic or not. 2) Besides restoring the phone to factory default settings (to erase all personal data from the phone), is there anything else I would need to do in regards to a SIM card, or contacting AT&T? I've never sold an existing iPhone before, so I'm not sure if there is a "gotcha" to doing this that I'm not currently aware of. I appreciate your help and input!