What is it worth
Ultimately, any car is worth what someone is willing to pay for it. If the milegae is indeed correct it will definitely make the car more desirable. Not knowing where you live makes it more difficult to appraise. How do you know for a fact the mileage is correct? In the eighties, many cars have odometers that go to 99,999. When they reach 100,000 the odometer starts back at 1. Simply looking at the rubberon the brake pedal can give you a clue. If the pedal shows alot of wear, the mileage is likely over 100,000.
Do you still have this wagon for sale? I'm in WY and mine just died. Please be in contact: 307.690.7477