My wife and I have iphones, a 3G and a 3GS. I am getting us both iphone 4s, but would like to know some general thoughts on or tips for reselling our current iphones to help offset the cost to upgrade. Will anyone be selling after the iphone 4 launch? Do you thing the prices will be forced down? Any thoughts on reselling would be great. I have both boxes, and all the original equiipment, plus cases and screen protectors. Both are in awesome shape... one still has 3 months of a warranty on it... what do you think?