Ok thanks for the help, Brad!
Now I need to figure out if I want to buy one.
I like the action, it's softer than the PX-150.
Even though this thing is way old, it still works.
Rarely have I missed a day playing it. My favorite voice is the electric piano.
But the one on the PX-s3000 is cool because Casio has built a synth into it, which sustains.
I guess some people think it's weird, but I love it.