I am sure this seems like an odd post, but I am trying to sell a 1987 Monte Carlo SS and I am not sure where to start.  It is Silver with Maroon interior, and has been garaged for the past 20 years.  It was in great working condition prior to being taken off the road, but does not currently run and has flat tires, dead battery, and everything else expected of a car that has sat in a garage for the past 20 years.  I am unsure of how much it is worth, because it doesn't run, but has less than 50,000 miles and the interior and exterior are pristine.  It is located on long island.  It was left to my mother-in-law  after my father-in-law passed away and she is looking to sell it. 

Can anyone tell me what I might expect to get for this vehicle and where can I look to sell it?  It isn't exactly something I can get a blue book value on!