When you walk in, everyone turns towards you and yells "Norm!" Check, although not Norm.
You know the history of 90% of the guns taken on trade because you were there when they were traded. Check
The local gun shops have your number on speed-dial as a consultant. Check, although I don't know about speed dial.
the dealer lets you wonder around behind the counter Check
The owner introduces you to his dog, who licks your hand. Check, not only have I been introduced to the dogs, but when I come in, he lets both dogs in so they can see me.
How about when someone comes in to the shop to sell something and the dealer says, I don't want to buy it, but I know someone that probably does and calls you.