Mate if you got a problem with your game going missing and you want to get it back go to steam support if you think we are dumb fucks and are gonna spend money on a "posible" scam we not.

Go to steam support make a steam support account and go talk to them they will sort it out for you if your not lieing as steam don't take away games, its your client that don't update proberly for many internet reason I won't explain

1. Steam are not responsible for your trades
2. Don't trade for real money as its always a scam unless its done through a sucure payment.