I think there are a couple variables in this
i believe where you live in the country/ how hard is $$ to come by?
Also how big of a rush are you in to get rid of it?
I usually get $950 for a unmessed with original posi rear and they do sell at this price i have sold at least 8
if i need some quicker $ i will let one go for $850
a year ago i had a guy drive 8 hours 1 way from canada to pick one up.
3 years ago i had a guy drive 6 hours 1 way from washington dc.
I have also had these rears sold in as little as 30 minutes of ownership
i have also had them presold so they are instantly sold before they even out of the car
dont under sell yourself
put it on craigslist with your phone # with a picture and i bet it wont take long to sell at all!!!!