If we can get 20M now then probably we can get 20M next year too so what's the point? Rather keep him and see what happens. He's still not even 20 years old.
The problem is, he's a young winger who we don't even want to loan out. And we have to bench 1 striker/play somebody horribly out of position at RW to accommodate him in his actual position. Bit of a mis fit.
Yeah if his sale guaranteed us getting someone like Gotze, Isco or Oscar I'd do it. We have Berdardi coming in next year anyway and we won't managed to keep everyone happy.