I can't off the top of my mind recall how many have been logged in my bound book over the past 10 years, but NONE of them have come from a "shop". I do have a first name relationship with the UPS driver though! Why buy from a shop, and pay his markup when you can order them from the same places he does?
A few I did buy in person, but they were from Cole Distributors tent at the Knob Creek MG shoot.
Cheapshooter's rules of gun ownership #1: NEVER SELL OR TRADE ANYTHING!