I bought 20 machines 25 years ago--
And have swapped them, 2 at a time, in and out of my house from a "free" storage space.
Today-- Despite being in perfect shape, I'd say they are only worth what I paid for them PLUS shipping costs.
The only regret I have is that I sold two of 'em instead of swapping them for other machines.
I wish I would have kept the "Who Dunit?" to swap for a nice "Black Knight."
-and-
I wish I still had the "El Dorado" to swap for a nice "Fireball."