There is absolutely no way Bilbao will keep Llorente for this season, and give him away for free the next. No club can afford to do that. Secco wouldn't even be that dumb.
Bilbao management is just waiting until the final hour for someone else to bid on Llorente or else he'll go to Juventus.
People thought the same thing about RVP and Arsenal, but in the end, money talks.