Most madrid fans want him gone if the price is good enough
It's the rational thing to do from Real Madrid's point of view. For several reasons:
1) He is over 30. Decline from here on forward is inevitable, even if heroically decelerated.
2) He can still carry a massive price tag, since his decline is not yet observable in statistical terms, if only in general gameplay. EPL clubs + PSG will be more than happy to cough up some serious money to get him.
3) Unlike Messi, he is not a cantera product for Los Blancos and the sentimental value is infinitely lower.
4) Ronaldo clearly plays for his stats and the Balo d'Or alone. No matter how many goals he has scored for them, the Real Madrid fans can never love him as much as we love Messi, or as much as they loved Raul (a much lesser player)
5) The Ronaldo transfer fee (along with their usual giant war chest) can go a massive way in re-building the team.
6) Has the potential to create more solidarity and togetherness in their dressroom.
7) They will get rid of his massive wages.
8) Somebody else can score all those penaldos and waste all those free-kicks.