Driven 'show cars' you can expect to pay 2,500 to 8,000. Again, there are so many variables that influence price that this is only a rough estimate. One thing I might add here is, Corvairs are very difficult to sell. There is a very limited market and if you think it's overpriced, it probably is. Not really, most everything is being reproduced with the exception of fenders and body panels.
Some patch panels are available as well as a considerable amount of trim pieces.
You will undoubtedly know of Corvair specific parts vendors when you start searching. Clark's Corvair Parts , Wall's Corvair Underground , Southwest Corvair Parts, Larry's Corvair Parts, The Corvair Ranch, are among the well known ones. I believe that I can say with certainty that there has never been a question asked or an issue addressed that hasn't been so many times before. The catch phrase 'Been there, done that' certainly applies to Corvairs and their owners. There is a very good support group available for this orphan auto.