I’ve seen them sell for $2500 complete so not far off the mark. As said above, you can buy a moser 12 bolt for that so for a non restoration it wouldn’t make sense to not buy new.
Depends I guess...are you a die hard restorer that wants the correct GM gear and posi too? Axles? Brakes? Hunting these parts down to install in this housing can nickel and dime you. With all new aftermarket parts, with labor youll have over $2500 total invested in it. When I see bare anything....I always ask why was it taken apart?