Unfortunately yes, the KN-2000 goes between $100 for the examples that are in rough shape to $300 for examples that come with the original box and are almost new.

Sometimes you can find one for $150 from a person who has no idea what it's worth, but then it's sometimes also a guess how good it still works..

I got my KN-920 for $50, when i got it home a few buttons didn't work, the screen had a line missing, and yesterday a key broke off..