Thick crowds huddle around the outside of the cases, staring at the choice issues inside. Sometimes it is impossible to view the coins because of the thickness and intensity of the crowd. The coins inside the cases, however, are really no surprise. They are most likely common date type coins in proof and uncirculated condition. There is usually very little variation in this pattern among dealers, because these coins make an expensive sale that will cover the expenses of setting up on the show floor.
Dealers have trade secrets.
One is not to display their scarce circulated material in display cases, but to keep it stuffed away in boxes behind the display counter. This is done because many of these coins are in high demand and can be sold quickly at any time to real collectors. These coins can be from any series, old or new. Also, some dealers would rather buy, than sell these coins at a show. Assume a collector is searching for better date circulated Liberty Seated coins in fine and better condition.