We've heard a great deal about the possibility of a low-cost Apple iPhone, and although naturally, the Cupertino-based company has not come forward and made any official suggestions, the supposed sightings and rumors of the device have yet to peter out. Today, a French site has come through with a couple of shots depicting what looks a legitimate shout for the rear shell of an unspecified iPhone, and the as-speculated plastic finish only but adds to the intrigue.