Peter, the high expected price that many people now have is actually a good thing, it used to be that a lot of stuff went into the dumpster and to the land fills. Now every little bit is expected to be valuable, and that save a lot of stuff that would not have been saved. When someone offers me something at an inflated price, I will tell them what I would pay and what I think someone who was looking for such an item would pay, every now and then, I end up buying it for my price. If it is something I need to fill a gap, I am willing to pay a little more if it is something that does not show up often, but I explain that to the seller. As a person interested in history, I would rather see something priced out of my reach than to have it trashed.
By the way, pawn stars is a staged show, it may have started with people bringing things to them, and may even have some still, but a lot of the real interesting stuff is sought out and is not being offered by the owner.