When you deal with Estate Sales or Liquidators, you're not going to get a full description of the game. They are looking to get rid of stuff, lots of stuff... lots of different stuff. They usually have little technical aptitude, or if they do it's not in the world of pinball. Are you looking at this online and is how you're gauging the condition, or have you seen this in person and perhaps even played it?
IMO it's quite hard to put a price on an old pin you haven't played. Newer games it's easier because less time has elapsed for things to go wrong. Bally Kiss is harder to pin a price because it's worth more than most of the games of that era. CL is correct above that you're probably close to $3K for a good one... but if you're only looking at some photos online, you probably should see it in person with some prices in mind given certain things that may not have been seen in the pictures. They may be basing their price because "that's what they go for on eBay" which is the worst reasoning in the entire hobby.
Also check for inserts cupping (concave) which may be leading to the wear around the Kiss inserts in the middle of the Playfield. It may not be a major thing at first but then when you play it and the ball isn't rolling in straight lines, you'll go crazy. Also if it's been in the same place not serviced for 30 years, you are absolutely doing a full teardown to get this thing playable again.
Good luck with the search. If it's a full functioning, well playing game with some minor cosmetic issues, you probably won't get it for less than $3K, but I'd try to start at $1800-$2000 and see how close you can keep it to that number.
Lake Elsinore, CA
