I will give you 7€ for one CS:GO gift. You have bought that for 5€ on christmas sale, so it is really overpriced.
Stop being a dickhead. It is not overpriced, the current price is
$15, and there's no sale. So you are making a good trade. Plus, who cares if he got it during the sale? If you didn't buy it duing the sale, you would still save something. Something is better than nothing. He's simply trying to make a profit