So I have come across a few scammers on this forum in the last 2 months. The guy selling the tippman M4 almost got me but I was able to get a refund ($300). I have had 2 more attempts from brand new accounts trying to make trades with me as well, both accounts are very shady. I would strongly recommend only doing business with people you know or people that you can meet face to face. I would not trust any accounts that are under 3 months old either. You have been warmed.
If you come across any accounts that you suspect of fraud post them here with as much info as you can provide, lets look out for each other.