That type of deals like that one we did with Barça: Ibrahimovic for Eto'o+45 mil, are really really unusual in high level football. BUT HONESTLY Icardi for Isco makes a LOT of sense, since we need that kind of playermaker and Madrid desperatly need someone who can score since CR7 left, yesterday game was like that, Vinicius and Benzema doing ALL good but then missing clear chances that Icardi would have scored.
I think in this deal. Inter, Madrid and Icardi, all would agree. But the problem is Isco wanting to come here, having in mind Guardiola will for sure make a bid for him to take him to Man City. But if we somehow can convince the guy to come he could be exactly what we need to play 4-2-3-1, he can also play on the wing. And that doesn't mean let 9golan go, he can play along with Brozovic or as a first sub coming out from the bench.
He is apart from Madrid squad because of ego problem with Solari, it's not that Lucas Vazquez is anything better than him. In a normal world both Isco-Bale would be starters there but they are having some ego problems.