People shoot for the sky on E-Bay. If it works for them, then fine. They are not worth that price, at least in my opinion. I could give the standard 'They are worth what someone is willing to pay' line, but that would be cliche.
I picked one up a few months back for far less than that asking price, LOL.
Theres a nice one a member here had for sale for $600 if I recall correctly.
I would think you could probably get one less than $500 if you looked around for a little bit, especially if you are not too worried about the sideart (i.e. if it would be between other machines).