Cut the guy a break, he got a 2k off ebay and found it it had an accel in it and he doesn't have any clue how to use it and doesn't want it. I've bought a1ks of ebay and found accels in them and had a hell of a time figuring out how to get them to work. I don't see anything particularly malicious about this listing. AS-IS, treat it as possibly broken, don't spend money on it you don't mind loosing.
+1
Looks like a good seller, perfect feedback, provided plenty of good pics and other information... What's the problem?
The way I see it, this is 25-year old gear, there will always be an element of risk. Even if it tested perfect in one A2000, there's a small chance it might not work in another... too many factors involved to provide guarantees. (Maybe your motherboard has blown caps, or your PSU is tired, etc etc)