Your tokens have almost become $250 if I see it right.
Even if you sell it there's no guarantee that you will not use/transfer/swap the balance/funds since you still have the copy of the private key.
Better to fund it with eth for gas/fee and then swap or trade it instead.
I originally thought that too but if the buyer takes the coins out immediately before the seller gets his money from the escrow, I think it would work. And,
we can use escrow service for this.
So, I don't think he is after scamming anybody but who knows...