useable diff or not?

[dan_g8]

i have been offered a lsd diff and the person has sent me a few pics through of the internals. i would like to know if the diff is ok or not pics and his email are below......

Thanks!

"Initially I was encouraged as the internals looked very tidy. However, after I turned the driveshafts through 180° I could see surface corrosion on the outside edge of the crown wheel and spots on the pinion gears. I can only assume this aligns with the breather where it has been sat. The diff turns over without problem.

I wouldn't expect this to be a problem (I would hope the increased surface texture roughness would retain an oil film better) "