I've got one, too! Bought it off the auction site a few years ago for $75. Seller tried to test it, but didn't know what he was doing and couldn't verify if it worked or not, so sold it for parts/repair.
When I received it ti was in really bad shape. Dirt caked all over it, but surprisingly it worked! Inside was very clean, as well. I was able to get the front panel looking as good as new, but the top is beat up pretty bad.
Anyways, while it worked great for DVDs, CDs, and single layer SACDs, it wouldn't recognize the SACD layer on hybrids disks and wouldn't play CDRs. I thought I'd eventually buy a new laser, but then I found information about it's auto calibration via the service menu. I performed that with several CDs, DVDs, SACDs, and then it magically started working for all media types!
I made some slight modifications once I got it working: I stole the output signal after the summing opamp through 1uf PIO capacitors to gold-plated RCAs that I installed. I will eventually replace this mod with a tube output stage, as a previous poster has done. But, for now, it sounds fantastic!
Cosmetically, this summer I will refinish the metal top.
Oh, you can get the service manual here:
http://www.hifiengine.com/manual_library/sony/dvp-s9000es.shtml