I end up sitting down to watch the first couple of minutes of these dreadful shows and before I know it I've sat through three in a row!
The worth of the items they find in storage lockers, barns or wherever is all theoretical: 'I'll be able to get $350 for this <whatever>'. You never actually see them selling said thing.
My wife said in one episode of something a guy found an old computer and said that he could easily get a grand for it. It was a Dell with a 3 1/2 floppy drive!