Apologies if this is in the wrong section.
I have a chance to buy an Atari IV cocktail that works except for the monitor. The guy is not being overly helpful, he keeps saying "Oh I haven't decided on price, just make an offer". He says it worked fine, all 4 sets of controls worked, until a month ago when the monitor stopped working. It still turns on, makes noise, etc... doesn't smell burnt or anything. For as ancient as it is, the machine itself is in good shape.
My guess is he doesn't know what it is worth and frankly, neither do I. I'll give him fair money for it, but I don't want to grossly overpay him either.
Google is not offering me the usual help either.
Can anyone offer some price guidlines?
EDIT: I found
http://www.arcade-history.com/?n=goal/4&page=detail&id=3763 but am not sure how accurate it is.