How rare is this and what's it worth?

Hey ya'll, I've got a good lead on my dream car, a 67 Dart GT convertable with the 273 4bbl/4speed, red with black interior. I have to be "interveiwed" by the owner before he will even decide to sell or determine the selling price. I haven't seen the car yet, but I know its not running and in need of a full restoration, but is fairly solid body wise from what I've been told. How rare is this combo and what should I expect to pay for a car in this condition? How much would it be worth restored to original specs? Any info will be greatly appreciated.

Good lord, is he trying to create some kind of mystic aura surrounding this car? Gimme a break. Is he going to slowly peel a silk sheet off it when you arrive? LOL I'd be so tempted to tell him "f**k you, keep it."

BUT....he might be "interviewing" people to try and weed out the Un-Mopar-knowledgeable flipper scum. I know that I have done that in the past. I find it annoying to have a potential buyer come over, supposed "Mopar lover", only to hear them ask if that's a 327 under the hood.....LOL If you've got 5 people as interested buyers, it's always nice to know your car went to someone who will treat it as their lifelong dream car.