He's done it before, getting rid of big names for the sake of the rebuild. I'm mostly thinking about Deco and Ronaldinho in 2008.
So he shouldn't be against sales, especially those that are pure Barto signings.
I agree. In addition to what I wrote above none of those 3 is commercially important. It's not like Griezmann is Neymar so you can earn something extra on him out of the pitch. If Messi agrees to lower his demands, and he probably will, Griezmann could become highest paid player in the squad and that's just absurd. If we manage to reduce the wages of Messi, Demebele and Roberto whose contract are expiring and get rid of the above mentioned trio our financial picture will improve significantly. In addition to that I sincerely hope we will also offload Pjanic. His wages are huge and he is probably the worst midfielder we currently have.