I dunno. Eventhough the wrist seals are likely neoprene, the neck seal is likely latex. You'll probably need to replace it. That will likely add another $100 to the price. The sad thing about ebay is.... There's alot of bad products. Let's say you got the neck seal replaced, then you find little leaks. Then the valves are sticking....
I would say, buy only new drysuit off ebay, unless it is dirt cheap and you are willing to throw a tiny bit of money away at a used suit. Even the new drysuit frequently will need new latex neck seal and latex wrist seals.... You can't be sure even when it is new.
Check out northeast diver supply. I got a new neoprene drysuit from them for $99. Likely will need to replace the neck seal within the season, but I can do it myself. I like the attached hood that came with it. It is just missing the zipper protector, which I can make later with another zipper.