You kind of wear the Iphone, not use it, its more of a fashion statment than a usable device. So it should sell very well, as there a lot of fashion victims out there more than willing to throw their cash away.
Once u get past the fancy jerky spinny menu thing, the Iphone is way past its sell by date. I mean come on, a 2MP camera!, they were around on phones like 4 years ago.