I've done a lot of gun shows over the years and found out a lot of things. Unless you are willing to spend an inordinate amount of time trying to sell a gun for top dollar, you probably aren't going to get your price. I'm guessing many of the guns you have now mostly appeal to a certain age group. That's the age group we're in here. Chances are very high they aren't going to appeal to the younger folks that don't have much money because they don't like working, and the older guns have no appeal to them. The people who can appreciate those guns probably already have them. If they have them why would they want another one at the top of the price range. They don't. They just think back to what they paid and decide they did pretty good.
Frankly the reason they will buy it is if they think they can make a few bucks on it. Hence you need to leave a little for the next guy. You MAY find someone that's looking for exactly what you have but they will remember how much they used to be.
Everyone wants to make top dollar on their stuff. Doesn't mean they are going to get it.
It's pretty easy to outsmart yourself self in this game.
Many gun manufacturers have found the same thing. That's why you don't see Ruger manufacturing the old rifles that are so nice. If people wanted them they probably already have them. So now they sell quick put together rifles they can sell cheap, tighten the nut that holds the barrel on. Frankly they don't appeal to me. But they appeal to the folks that don't have a lot of money or know much about guns. Doubt you have any of those, and if you do, they can be bought in lots of places. So you have to make a deal. As Hittman said, don't get gready. If you go to very many gun shows, you see the same old guns every time because they want top dollar, and aren't going to get it, from the older and wiser guys that actually have some money.
I like gun shows because it's easier to sell something people can lay their hands on. But that doesn't mean they are stupid and willing to pay whatever price for a gun that's similar to what they already have.
A few years ago I had a couple of rifles Ruger didn't make many of and figured I was going to get "top dollar " on them. To do that I went the auction route. The first rifle I was amazed at how much I got, so decided to sell the other one. I got less than 2/3 the price I had got on the first one. Auctions can go either way. Many folks won't bid on a gun that has to reach a reserve amount, but no one knows what that price is.
Don't get me wrong, I like the top dollar price idea myself, but I don't necessarily expect to actually get it. I'm more of a take the money and run type of guy. I try to price things at what I think they will actually go for and not the pipe dream.