I fully agree that most gun shows can be disappointing. As noted,, some,,, too much flea market stuff. And prices,, can be higher than we think they should be. But if the sellers were not making expenses & a profit,, they would stop buying tables, & spending the other money they spend to be there. So,, SOME people are buying stuff!
At a gun show,, among the tables,, you can find a deal or two if you know what you are looking at. Especially if it's a slow day for the seller. It doesn't always have to be a firearm,, but little things often pop up as accessories we can use. I've bought all sorts of little things I could use. I do not recall going to a gun show where I didn't buy something. It may have only been a set of Ruger rings,, or some brass, or whatever. But I found a fair purchase.
Prices,, yes,, the sellers at a gun show put a price on something,, but most often you can discuss the sale in a FTF manner that can often get you a fair purchase. At a gun show,, you can handle, study, & carefully inspect a gun or something BEFORE paying for it. At a gun show,, there's no shipping/handling/FFl fees. A sale is made by discussion & no "add-on's"
And if you find something,, and the seller & you can't reach an agreement,, you can walk away,, just like scrolling past an ad on GB or wherever.
Besides,, going to a gun show supports our Freedoms. If they went away,, the anti's would cheer!!!!! They would have to find a different "cause" other than the "gun show loophole" they clamor about.
All in all I think the OP did quite well in his purchase! KUDOS!!!!!!!!!!