I understand what Westwind is saying, and you will too once you've been here a while.
While I wouldn't necessarily not do a deal with a newbie, I do prefer to know a little something about the other party before making a commitment. That being said, a gun or other item can be examined before actual funds transfer hands so everyone should still be protected. It's just been the occassional non firearm transaction where things were shipped (or not) that make a low post count person subject to deals not being as fast as others with higher counts or interaction might be.
If Westwind, Bronker, MagicCarpetrides, Mike.357, even Strickj posted up something I wanted, I wouldn't have an issue just sending them the check or Pay Pal and meet up when it was convenient or have them ship the item. Someone that shows up for the first time with no interaction amongst the other members yet will get a bit more scrutiny.
So in a nutshell, join in the chaos that is TGO and engage in the conversation.