I just sold one last month for $85. The older generation models actually have one advantage - they can be used standalone with MIDI hardware as they have standard DIN MIDI connections. The newer models only have USB midi connections so they can only be used with a DAW/computer. However, in my opinion, the older models key-bed left alot to be desired - very stiff for my tastes - hence one reason I sold it. FWIW I paid just over $100 for it about 5 years ago.

Tons of controllers on them, but unfortunately most are over on the right side of the axe - if you are used to playing melodies and chords with your right hand, you'll be reaching over with your left arm/hand quite a bit.

This is one reason the new Casio XW-P1 was so attractive to me - all of the controllers are on the left 1/3 of the axe; sliders, knobs, etc. all where the left hand has quick and easy access.