Could very well be like you both say, that no other big club with economic muscles is in the need of a CB. But I would still assume that some PL clubs would be interested. If not, are we not paying more than market price?
I think it is more the high salary in that case as we are one of few clubs who don't mind paying these high salaries. He said the same when he signed for Juventus, that he only wanted Juve, but I don't see why he would only want to join United. Anyways, it is an interesting signing who will strengthen the team, even if I personally thought we would need reinforcement better in midfield.