People who think Milan could sell Robinho for 20 million (or above) are being ridiculous. We bought him from City for 18 million - how in the hell would we sell him for a higher price? Further to that, take into consideration he's two years older and has had a very average season. No one will pay that much, especially Santos who seem to be the only club (publicly) interested in him.
As for Allegri potentially leaving, I think that's a bad move. He's done very well considering the number of injuries and implied pressure on him to win a consecutive league title. For those saying he should be playing more of the younger players; how does he do that when he's expected to deliver the scudetto? Of course he's going to overplay key players, even when the risk of injury is there. It's an unfortunate circumstance but every manager does and/or would do it, more or less.
As for Allegri potentially leaving, I think that's a bad move. He's done very well considering the number of injuries and implied pressure on him to win a consecutive league title. For those saying he should be playing more of the younger players; how does he do that when he's expected to deliver the scudetto? Of course he's going to overplay key players, even when the risk of injury is there. It's an unfortunate circumstance but every manager does and/or would do it, more or less.