I placed an ad: FORD 9 inch axle for sale or TRADE for Mopar parts...
Sellers of a complete 8-3/4 rear end cam range from $800 ro $1200 as I have observed. The price gap is due to actual parts on the package. Suregrips, performance gears, spools, back braced, disc brakes, etc, wil alter the price as well as the condition of the housing itself.
For a MoPar, this is a very desirable rear end. Even more so for small block equipped A bodies.