Because there’s a possibility that he is just reselling the goods that he is buying to you same on his previous item. His old supplier of this item might not be available right now so he choose you since there’s a chance that he has a loyal customer that he is supplying. Being a reseller is not a sufficient evidence that the user is a scam. Your proof is so hard to verify because it contains incomplete info about your transaction.

With this question of yours. It looks like you are using this as reason to decline your responsibility to deliver the goods to him.