The first car that I purchased was a 1972 Delta 88 Oldsmobile with a 455 engine. That was in July of 1976. That has at the height of Jimmy Carter's oil crisis. The dealership first listed it at $1,795.00. A couple of weeks later they dropped the price to $1,595.00. A couple of weeks later they dropped the price to $1,395.00. I had just turned 16 at the time. I had a buddy give me a ride to the dealership. After about an hour I was ready to agree to $795.00 but the salesman stated that if I could not afford it, I should be looking for something cheaper. That ticked me off so 2 hours later I agreed to purchase at $595.00. The general manager had to step in. When it came time to pay you should have seen the salesman face when I pulled out 30 $100 bills. At the time I was making $1.95 pumping gas after HS.
Later when I was in college, I need a different used car. They were asking $3,995.00 for the one I wanted. Four hours later it was mine for $2,500.00
Back to gun shows. The last hour on Saturday is very good since lots of the sellers have their eye on something they want cash on hand for Sunday morning before the show is open to the general public. On Sunday the last hour is very good also but that can be more hit and miss.