i bought my 3gs last july. i'm planning on using my warranty to get a replacement (mine has an overly sensitive ringer button and the battery is getting bad) one that looks brand new. i can easily sell it on ebay for at least $400. assuming the new iphone costs the same, and that i would have to pay $400 for a new iphone since i'm still in contract, i would pretty much get a new iphone for little to nothing. just wondering if anyone did that last year..