O'reilly's rebuilt CVs are a crapshoot. I've gotten 1,000 to 50,000 miles out of them. Certainly never 200,000. Also, last I asked, they were NLA.
What someone told me is that the rebuild shops regrind them, but not re-case-harden them, and their life expectancy has a lot to do with how much hardening is left. The first time they get rebuilt, you get 50,000 miles. The second time....
I repack my wheel bearings every time I do CVs, which is every couple years on average... and I've had them go out on two cars now. Front right of my daily driver started growling about two months ago... got the bearings, but no time to change them.