Cost for replacing Ring and Pinion rear end F3 chassis

Did you check on what a rebuilt 3rd member would cost? Should only take about 2 hours labor to R&R the 3rd members.

$2300 for new stuff is a good price.
I could easily put that in my rear end.
Well.. er.. you know what I mean.

For $1000 you should be able to find a complete rear axle.

Sounds about right.