not everyone have the chance to hold a real phone before and can tell a fake and real especially if there are close to 100% real.

I read a lot of ppl got conned when they buy iphone from shop and it is actually china iphone. A lot of people do not know or cannot tell a fake and real easily as they are just normal users.

This is clearly a scam job. Seller need to be responsible for this. I suggest TS lodge a police report. Hope that you have enough of his details.