Madness to let go a player for free even he has a year left in his contract.
I am not disagreeing that Robles is slightly better than Stek but due to his rejection on signing a new deal, I don't want to lose him on a free that's why he has to be sold. This is unlikely now even the Spanish window is not closing yet.
I would have sold Barkley (cos of his contract), Lennon, McCarthy, Robles, Niasse, Garbutt if I am the manager but in reality some tosh left over by RM are mission impossible to get rid.