Well, For starters a brand new account coming in here selling digital assets that can be easily retrieved screams scam.
If you were going to escrow, You'd have to give the dude doing the escrow the email/password and the steamID/password...
Then the escrow would change it to something different so you can't steal it back.. then give the info to the buyer after he pays you.
The only real problem I'm having with this is that you are a brand new account trying to sell shit that can be recovered..
You should probably stop wasting your times on the forums trying to scam people and go try and learn some marketable skills man..