There is a magazine publication called "Old Cars Price Guide", which is available in good newsstands, like a Barnes and Noble Bookstore. It is organized by car year, make, and model, and gives five price categories, which are based upon recent car auction activity. It tells you how to select your category of condition "1" thru "5", based upon approximate condition which it details out. If your car has all matching numbers (the engine etc., has matching numbers to the cowl tag in the engine compartment) you probably can get a premium in addition to the price it shows. I have used the publication for many years to see when I should adjust the value of my classic car's "actual stated value" insurance policy, and have never been turned down by my insurance company as to too high of a value being imposed...

Sources: http://www.oldcarsweekly.com/oldcarspriceguide/

You might want to check in Hammings ,or look on E-Bay to get an idea of what other cars like yours are selling for.