You know....there's always the possibility that some of the following may exist and may be floating around:
*early demo models
*demo models sent to exclusive parties for reporting and evaluation
*initial manufacturing pipeline test run models
*models used within apple to test the product
*etc models
The fact that those models could exist means
the possibility that some of those models were 'misplaced' (lost), or 'unfortunately left unmonitored' (stolen).
Which would then mean there is a possibility someone, who is not intentionally supposed to posses said models, may actually have in their possession one or more legitimate iPhones.
Which would then mean such person(s) may have decided to sell them on eBay
Yes I agree to what most here suggest [ SCAM ]. However, I wouldn't be the least bit surprised if there is someone somewhere right now that has $1125 less cash in his pocket but 1 iPhone in the same pocket to fill it's place.