'86 or '87 posi rear-end

[MALIBU1]

I am thinking about changing over a ZZ4 350 Chevy crate motor, 700-R-4 tranny, and a 8.5" GN posi rear in my '80 Chevy Malibu wagon. Does anyone have a vague idea what the posi rear would cost me? I'm looking for a used, but still in good condition piece, with brakes, axles, pretty much the whole rear and everything on it. If anyone could let me know, I'd really appreciate it! Thanks!

 

[strikeeagle]

They seem to be $850, give or take...