If you want to argue for the sake of arguing I guess you have somewhat of a small point, but you're missing (likely on purpose for the sake of arguing) the (I'd say) general consensus of going with a part that you know the history of an rebuilding, vs shelling out big $$$ up front for a used transmission and then having to possibly rebuild it, and then discover that some clown was rugging it, banging it into gear and it now has a split case.