Steve, that's a real tough question without pictures (a lot of them). As Pantera's have increased, I would say recently the largest jump has been in all out survivors. If a Shelby or Corvette, for instance with a national judging body were found in all original state then people will pay quite a bit because those rare hard to find original parts are often unobtainable. We don't have that judging concourse group (perhaps someday) but unaltered Pantera's are extremely rare and if it has all things such as the dzus fasteners, a complete tool roll, space saver and bottle etc it has considerable value to many. The motor with careful attention and patience might actually be fine and the ZF as well. Without seeing the car its very difficult to say and everyone wants a deal, but I would think if original paint can be saved and look good and absolutely everything is present I don't think $80+K is out of line. If motor and zf can be gone through you could have something with effort that would fit into a concourse survival class. Auction sales on BAT and Meccum for low mileage survival cars has been quite strong. But its always easy spending someone else's money.
Do you have the serial number?