I'm not into the iphone (personal reasons) but i'm eligible for upgrade and i;'ll be opening a second line tomorrow for work. So my question is: if i get two iphones 3GS at 199, activate them and then sell them on ebay, will it work? I see them going for a lot more than what i would pay, so i could make a good profit from that and then just use other phones on those two lines. is there any catch to that? or is it as straightforward and profitable as i think?