I don't really mind if we sell him.
From my perspective, Inter didn't acquire him because of his performances, in a sense we didn't get out of our way to buy him from Milan. They got him primarily because it made financial sense; he was a free transfer, if he wasn't a free player, he would never come to Inter. We already had a solid midfield, and while Calha was a good addition, he wasn't essential.
The plan was never to buy him, retrain his position and in the meantime find buyers for Brozo. He just happened to be good enough to adapt in a completely new much different role, under the way Inzaghi intended for Inter to play.
I might sound ungrateful, but while I appreciated Calha's time here and he was undoubtedly one of the key players in our title run, Inzaghi's system enhances the players more than the players enhance his system.
Back then who would've thought that Calha would turn out better in Brozos position for the system we play? Except some guys who would say that after 1 game while Brozo was injured they saw everything what was going to be from Calha, nobody in his right mind saw that coming.
Players adapt, systems adapt.
We'll be fine. We might get more physical without Calha though, more yellows, and potentially red cards.
Realistically anything above 40 millions is fine. But in this market he is worth much more, I just doubt we can get more, especially if he wants to go there too.