Have a 3.5 ratio OPEN - R180 differential.
Was working when removed from car (several years ago) - has been stored in a closed garage with oil until now. Turns smoothly, I can remove the back plate for photos for an interested party. In the interim I have looked through the drain hole and all gears look to be in good condition with no rust.
You will need a front flange to mate with your drive shaft - the one in photo comes from the Subaru diff I swapped into the car.
There was nothing wrong with this diff I just swapped it with a better ratio Subaru diff. I’m a realist and know this is not a particularly desirable ratio which is why I have priced it accordingly.
$200
(located Newcastle - can assist with transport between Newcastle - Canberra)
PM if interested