Regarding the gun show guys still trying to sell their $69 .22lr bricks; years ago I would occasionally help an FFL dealer friend with his tables at gun shows. He explained why he thought so many gun show people have the same old overpriced stuff show after show, year after year. Some people get caught up in how much money they "have into" something. "I can't sell it for less, I have more than that into it."
He explained what is obvious to most but beyond the grasp of some people: what you have "into" something you have to sell is completely irrelevant. It's only worth what someone is willing to pay so if you have too much into it, you're better off just selling it for what you can get and using that money to buy something you can sell and make a profit on.
Should be basic business 101, but so many of us often end up married to what we "have into" something.