NOS 1973 DUSTER DART TWIN SNORKEL SCOOP......WHATS A FAIR PRICE??

Best bet would be to put it on Ebay and put a reserve on it of what you think it's worth or would take for it. I know I've bought nice used ones for $300. I'm sure someone is out there looking for a new unused one.
Yea...$300/350 seems to be the going rate for decent scoops....some missing studs...hairline cracks. Besides a decent coat of paint this one is perfect. It only needs paint because of 'boxrub' from over the years.