I just bought a 500GX on E-bay. It was described as 'minty, pristine'. And it does look great, very compact, clear/bright VF, solid build, the battery even works, meeter seems ok.
But then I opened it up and the seals had turned to gooey stickey mess...I should have known better I am looking for a good repairman to get it in working order, and if I can it looks like I'd enjoy it as a knock around camera, to keep in my laptop bag for work. Good luck. What do you think so far of yours?