Sadly clientele are dropping like 🤔. I remember when local dealer talked to young buck at gun show regarding fine Parker he brought to sell. This was about decade ago and fella was told that he could not offer him good price because clients who would buy it from him were not around anymore. He used to sell high quality military guns before he closed Warrenton business and went to work for North Eastern auction house.
Gun buyers and collectors have always gotten older and died. They keep getting replaced by younger guys.
That dealer was trying to lowball the young Parker guy
The young Parker guy was there to exchange his gun for cash. You should have approached him with a fair offer as soon as he walked away from that dealer. Time spent at Gun Shows is for finding deals you'd likely not find just walking into a gun shop. They are not a place for paying an admission fee to just kick tires.