Well I will see following things:- How much iTraders from high profile members count. At least 5 positive itrade. Rep at least 2 bloobs The main thing is joining date. Most of the scammers registered like today and scam people like day after yesterday and so one and then banned. Only the oldies are trust worth members
I can say that being an oldie doesn't make someone trustworthy. I suggest when seeing if someone is trustworthy, look at their itrader with in the last 30 days, check the details of the itrader, and check to see if any of the itrader is related to the service you want.
TBH I really dont go by trader points, its more a feel for the situation, yet to be bumped so must be working. Remember scammers can easily build up reputation, this is where most people get caught out.
I recently saw a post saying that itrader points can be bought at peanuts. Is it useful at all as an indicator? I stand to be corrected.
I usually base my trust on a members reputation and how long are they have been members in DP rather than itraders. I would deal with a high rep member even if he or she as one or two itraders.