Never buy an axle without looking inside first. And you really shouldn't drive very far without them sending pics of the insides first. I drove 1.5 hours out to look at one that instead of gear oil had rusty water inside with crusty ring and and pinion. Another similar drive and the ring gear had like 1/3 of the teeth chipped or broken. Both axles were "working when pulled" and both sellers were "sure everything was good".