I've been considering purchasing a cnc mill for some time now for business use, and a local shop in the area is having an auction coming up and are selling out their machines and tooling. However I'm having a difficult time figuring approximate costs of such a machine, or even where a fair price is to stop with at the auction. I've been a bit stumped with just browsing and searching for reviews and price range for similar machines. Any help or direction would be appreciated.

Other machines of interest at the auction:
*1998 HAAs VF-4 CNC VMC with HAAS 8" 4th axis rotary table
1997 HAAS VF-3 CNC VMC
1995 CHIRON FZ-12W CNC VMC w/dual pallet changer and FANUC OM control
+cabinets of the businesses toolings for the machines (though i believe they are auctioned separately)