Any idea what this 70 440 Duster is Worth.

No sugar coating here.

I'll chime in here and say it's a 5-9K car.

The nice is it's a panther pink 70 Duster.

Bad:
The rear suspension on that car is not very well designed or thought out IMHO. I see some problems that would have to be corrected.
Fenderwell headers

The car is a tweener, not a full on race car and not a street restorable piece. Leaves it in limbo. Hard to tell what's up with the cage.

I passed on a Demon not long ago that was a very nice car, ladder bar, 500" roller, all the right stuff, ran low 10's on the motor and was put together correctly for $9200. I think this car has at least 2-3K in work to get it to the point of the car I passed on, primarily in the rear suspension. Yes I was a stupid dumbass to pass on the Demon.