To me, this is a '71 car that someone, somewhere, has added the '70 hood and grille. A semi-loaded 383 car. Nothing out of the ordinary. Nice car, granted, but it's probably one of one in GG's registry, and nothing more. One-of-one in a registry means squat. GG's own little white book lists 3,915 '71 Sport Fury two-door hardtops built. Only one in this color???
I'm gonna be honest with you, seller, you have a nice $7K - $8K car there, as-is. Pretty straight, needs the vinyl top put on, hood painted, rust repaired properly, car detailed...about $4K worth of additional needs, from what you have pictured. What's the interior look like? No pics, so there is that mystery. Assuming it is NICE, but with no pics, who knows?
And then, maybe you have a $10K - $12K car, assuming the interior is NICE and needs nothing. If it needs help, now you have anywhere from another $2K to $4K in interior work...it's not exactly "priced to sell".