It's impossible that Madrid would let him go, let alone for 19 million.
Pepe and Ramos have been rock solid under Ancelotti, that makes it's not so easy for Varane to get into the starting lineup but Pepe will be 32 next month. Varane's time will come soon and he knows it, he renewed not that long ago. He's a special talent, I think he will easily surpass the likes of Thiago Silva. Very rare to see such a big defender with such immense acceleration and pace yet he doesn't rely on physical attributes or aggressiveness at all but displays intelligence, great positioning and reading of the game.