Chelsea is going to hire a player like Maguire because of his huge personal mistakes and I think a player like Maguire is not really interesting for any team to spend huge money for him and 40m is a lot for this player, Chelsea had expensive players before and they didn't get food results that's why I think Chelsea can find a better player instead of Maguire.
It is still a rumor, we don't know how serious Chelsea to sign Maguire. I even think Chelsea current defenders are better than Maguire. Even if they are not strong enough but they don't score own goals at least. 