This ‘we will give you £30m‘, ‘no we want £50m‘, dance, played out for the press, is just PR for both clubs. It is already sorted I suspect, at a fee somewhere in the middle, to make both parties look like ace negotiators.
Brighton are a very well run club, who know that they need to keep attracting up and coming young players, within their budget. If they start to block the progress of the most successful of those players to CL level, they will stop being an attractive proposition for said ambitious young players and their agents. It would be self defeating, so they will get a good fair price and then sell.
People quoting their stance on Ben White are missing the fact that he was home grown, not a shrewd acquisition from overseas. It is very different.