Don't be surprised if a handful turn up over the years.
Yeah, I was on this Atari forum, and a week or so ago someone noticed that all of a sudden, a Bunch of Compumate keyboard type things for the Atari 2600 started showing up on e-bay, and those used to be pretty rare.
Complete in box.
Turns out someone came across a warehouse in South America full of them (and some other stuff)...
So, you never know...
desiv