Originally posted by Rob -
BUY, SELL, TRADE at your OWN RISK!
DO NOT CONTACT TRAD GANG ADMIN OR MODS ABOUT BAD DEALS!
Get to know the buyer or seller (aka "the person") as best you can.
Do a forum wide search for that person, look to see when that person became a member, the number of posts made, what the person posts, how the person's posts have been received by the membership and how that person interacts with other members.
Contact other members about the person for feedback of their opinions as to the credibility of the person, and what's the person's buying/selling track record.
Get the person's mailing address and phone number - it wouldn't hurt to make a phone call chat, if possible.