so is the car just sitting with no motor or transmission?...If so, you may be able to get it pretty resonable...if the present owner has no intentions of fixing it up. How is the interior?....does it still have low miles?...Does he have any of the paperwork?you can check some of the Ebay listings ...but those are usually "clone" cars....but it will give you an idea...
....here is a good website also to check out.....you may already know about it...
http://www.impalass427.com/index.htm
good luck
