How many factory sun roof a body's out there ?

I've owned two. First one was the most loaded A body that I have ever owned: 1976 Dart Sport. 318/904/8.25 axle. Power discs, power steering, A/C, stripes, vinyl top, rally wheels, plaid cloth seats and the sunroof. Second car was a 73 Dart Sport.
The 73 was bought to fix up and sell. I really thought that they were desireable until I tried to sell it. It took 5 tries on ebay and I still didn't get nearly what a same year Duster would sell for.