This is the exact reason why i think a GN posi rear should not be worth $1000thats just greed
no, it's supply and demand.
People will only sell a GN rear for $1000 if somebody will pay them $1000. Otherwise it will be taking up space in their garage. You could have bought all of the GN rears you wanted back when they were $500 and tripped over them in your garage for the last 10 years.
Of course you would be asking $1000 for them now, because of the hassle involved, but at least it wouldn't be greed, anymore.
The answer to $1000 GN rear ends is offering the seller less for them. If they really aren't worth $1000, somebody will take you up on your offer.