I recall several of the larger shows I used to attend where trading was an important facet of the show in general. Wheeling and dealing was part of the lure. I’d buy up Colt Sauer and Weatherby rifles locally, or other finer stuff, and make isle deals with folks for some of the Sako rifles etc. I have, or had. No paperwork, swap and walk. You could make a deal, then go to the car and retrieve the next item up for trade. Those were fun times.