C-clip eliminators? Still drums? Steel drums or aluminum? Old brakes or fresh brakes and hardware? Any pitting in the metal or rust on the spring perches?
Only tricky thing about selling a zero mile never installed rear with new gears is the buyer has to trust the work that was done. Myself, that means before all the work of an install into my car all that needs to be gone through all over again.
I'd rather either a stocker untouched from the factory, or, something I could test drive if shelling out more than parts car part level money. Even a rebuilt unit that had some miles on it I could open up and check out and see how things had been working.
Based on what i know so far, throw out a price of $1250, and take anything that shows up over $1000 cash in hand.