Napoli sold Cavani their best player
Milan sold Ibrabeast and the best CB in the world T. Silva
And Tottenham sold Bale, their best player.
Roma will sell a CB who is not the best but has so much class, they can take another good like him and have another money to take players for depth and for basics. And if you have good scouts and management you can buy player-S- (not one) to replace a star. Like that we made with Zidane, like that Atletico made with Falcao, Aguero, Forlan etc.