Actually, I don't care if the member has been here for 3 years and has several posts. I also got scammed by someone here with a join date of 2010, 100+ posts. I believe at that time I was looking for a 5D2. The guy PM'd me, sent me pictures on my email and was very prompt with his response.
I almost hit the payment button but something about him was just off. My instinct probably, at that time the body was being sold for about $200.00 less than the market price. Now I know there are AMAZING DEALS that are valid in this site but still, I just used common sense and avoided the deal. Guess what? An hour later I think it was Pekka who sent me a PM advising not to deal with that member since he's a scammer, turns out he was also selling to a few members on this site at the same time.
Whew, that was close. You know the saying? If its too good to be true, then it probably is.
Only way I buy really is from people who are active here if not at least someone who has a established website and perhaps willing to communicate by cell.