Lots of clowns with no understanding of transfers or negotiations on this thread.
If you run a successful football club, like any business, a key part fo what you do is to try to get value for money with all your purchases. That's Txiki's job and he's done it very well so far. If we were to just panic and throw the asking price at every player we were interested in we'd be the club that many ill-informed balloons already accuse of being: a wealthy Arab plaything who inflate the transfer market. And we'd get done in every transaction we made.
We are clearly going to be signing a centre half and the club's track record is more than enough for me to be relaxed and judge them after the window closes. Many big deals - and these are worth enormous amounts of money - take time. You can't negotiate by appearing desperate.