The trade went well and he sent me a gift link, which I was saving for a later time to use. After about one month when I was ready to redeem the gift link, I can't do so anymore as now the gift link has been used. So he burned my game after a successful trade.
I have contacted him to clarify the issue, since maybe it was not intended and he can explain himself, but havent heard back in weeks. Please contact me.
After some time he managed to find me another working copy of the game. He's an honest trader who just did a mistake, overall I would recommend trading with him!