Hi all, this is my first post and hope it’s in the right stop, but.... my question is I’m looking at a rear end that is a 8.5 10 bolt that came out of a grand national. I’m just not sure of the value of it with and without a posi unit. They are wanting $1500 and it’s supposedly a posi with 3.42 gears. Any help as to the value of these rears would be much appreciated. Thx