Sorry to hear this, a nightmare for sure!
I actually know very few folks here, in terms of having met them. However, I've had nothing but A+ experiences on every single deal. Very honest dealers here.
Whenever I'm about to buy, trade, or sell something here I always check their post numbers and then go to some of the threads they've started or responded too. If someone doesn't have several hundred posts I'm pretty shy of them.
It is uncanny how often when I'm reviewing some posts how I'll come across someone who knows the person. I then contact that person to get sort of a reference. A phone call with the prospect can also be enlightening.
It may take many dozens of transactions (which I'm not planning on) before I run into a bad apple but I haven't yet.