I don't see TB selling Biss, White or Sanchez this summer. White and Sanchez haven't had enough PL experience imo to command big figures.
Biss has been outstanding but got more to give and unless big money comes in, why would TB sell. Jan or next season with Moises settled, yea can see it. Biss is only 24, still coming into his prime and thus value.
The obvious answer to the "why would we sell?" question is "because we need the money". We've made huge losses this year and need to invest in the squad. I expect at least one big departure and suspect it will be Biss. However, I'm not convinced we'll achieve the numbers some expect when we do sell some of our prized assets.