I think Bob is refering to the marts that they have/had at NAWCC regionals. With the advent of eBay, I’m not sure if they still have them or if they do, whether they have the deals that they once did. I know when you look at the NAWCC marts on their site, there’s almost nothing there.
Yes Tom is correct about the NAWCC regionals. Also NAWCC local Marts which are often held monthly in many major cities. You can check their mart locations and schedules at their web site at NAWCC . org