I'm selling my iPhone 6. My son wants to buy it now. That's fine with me...but I was selling it early to get a few bucks more bc I have two phones I can use until the new one comes out. It seems sort of mean to charge my boy top dollar. I owe $450 or $480 on the next plan. He has most of it in cash and is going to sell his phone for the rest. It is a perfect scenario but now I can't decide how much to sell it for? Should I just sell it for what I owe. It is a space grey 6 64 gb AT&T. He has wanted an iPhone but he doesn't get to have it activated....and we haven't wanted to pay full price for one. This way he gets one with apple care plus etc so it would be great.