Here's a site for the value:
Those Furies are nice. Before I bought my car, I was considering an old car, and those were some I was looking at (with a 440 of course
). I like them, but I guess you'll be selling to a selctive audience, as they aren't that popular (compared to a Mustang of the era). eBay will work if you want quick cash, but selling it locally will likely wind up being better if you don't mind waiting for a while. I might be wrong, but I think craigslist.com has free classifieds that are frequented by a lot of people.