Except it's stupid for him to sell those online. If someone buys them, and files SNAD with paypal for counterfeit item, they will insta-win the case and get to keep the item to "destroy" it -- wont matter that he said they are fake. Pretty sure it's illegal too. Very stupid of him.
Those look awesome, and real to me. Back pockets and scar are all correct along with the Dior "charm." Would need to see the tags to be certain. Sub-$300 sounds about right for used and that old without being $75 and obviously fake.