To be fair, a discussion on a players potential transfer fee can go off on so many tangents that I wouldn't say that it is pointless.
Just looking at the complexity of a deal of this magnitude shows just how difficult Txiki's job is and the guy has come under a lot of criticism recently. Like another poster pointed out, Everton can demand what they want for the player and because they don't want to lose him, they will put an over-valued price tag on his head. However, Txiki's job isn't to either pay up or shut up. His job is to force Everton to meet us somewhere in the middle and put them in a position where it could cause them damage to keep the player.
For all the talk of Everton being willing to keep Stones, do people really think that Stones and his agent will just sit there and happily be denied another big money move? Is he really going to accept to stay at Everton on a hell of a lot less money than he could be earning at City whilst playing in the CL?
Not a chance. There will be huge repercussions for Everton should they decide to reject all bids for Stones and dealing with them will be crucial, especially as they see him as a £50 million asset who's value could quickly diminish.
They are already looking to replace him and once that happens, are they still fully in control of any deal?