

I think whats mre paranoying is that when you get scammed, you become wary of every trade that you do afterwards.
My advice on that is just don't do mulitple trades, especially with a new account that has expensive items, unless you can see how many posts the person has made, see all their comments on their profile and if there are other reasonably older accounts knowing the person and they can back it up that its a mule or what not.
But simply remember the golden rule
If it seems to good to be true, then it most probably is.