Vidal will never be sold.
He'll be 27 this year. Transfers nowadays are all about age. Obviously not that other teams won't want him.
But he's way too important and attached to Juventus and Turin. The man has a Juve tattoo, for fucks sake. He loves the city and the fans.
And 352 is ideal for him to fully develop his potential, as he's doing, under Conte.
Pogba won't stay forever and may be sold any given winter. But Vidal is definitely staying, I'm no even worried about that.