A very suspicious advertising topic.
If he had gift cards, he would easily buy cryptocurrency with them.
Or he could sell them to trusted buyers for 70% of the face value.
I assume that he sells them to naive suckers for 30-50% of the balance.
So, do you sell through a guarantor service (escrow) or do you require a full advance payment?
UNTIL HE HAS BEEN CHECKED BY THE ADMINISTRATION - DO NOT BUY ANYTHING FROM HIM AND DO NOT MAKE ANY PAYMENT!