Hello! I've been using a black factory unlocked 3GS with 16gb of storage and want to sell it. I've still got the box and all the accessories but the headphones. Of course, it's 6 months old and has a couple of very minor scratches on the back. anyway, i want to sell it and am not sure how much i should ask. does anyone have any suggestions? a friend of mine works in a cell phone shop and said they sell the same thing i have (only new) for $900, so he suggested i should at least be able to sell it for 700. what do you think? as long as i'm asking, you can let me know if you're interested in buying one yourself. i figure that the new model might also but a small damper on the prices, so i just want to get an estimate as to how much i should ask for. thanks in advance!