833 4 speed pics - what condition is this in?

Look at the wear of the shift forks. IMO, this one is not rebuilt. It just had synchros and probably the usual washers and bearings replaced. 2nd gear looks like the teeth on the synchronizer section are beat. It should have been replaced. Can't see much of third, but those two are usually the hardest worn ones. Hard parts are expensive, so you see a lot of this.