My nephew is a Corvette guy, but loves working on all old cars. He was just offered a very clean 1967 Olds Delta 88 convertible that will not take much to return to concours condition. He checked for my advice, but frankly - I'm a Studebaker guy and don't know much about Olds values and parts availability (if needed). How deep is the market for this car? Could he resell in the future if it didn't suit him (or his wife)?