Fernando Llorente, who has been linked with Arsenal and Manchester United, will cost no less than €36million, Athletic Bilbao have insisted.
The Spain international, who is currently in action at Euro 2012, has been linked with number of clubs in recent weeks, with Chelsea, Manchester City, and Tottenham also thought to be showing interest.
Reports in Spain last month suggested Llorente, who has also been on Liverpool's radar for over a year, has emerged as Barcelona's top transfer target, with sporting director Andoni Zubizarreta said to have already given the green light for new coach Tito Vilanova to launch a bid this summer.
The forward earlier this month hinted that he could be ready to move to the Premier League if and when he leaves Bilbao, but the La Liga outfit insist they will not let him leave the club for less than the value of his buy-out clause.
Bilbao president Josu Urrutia said: "He is a key player and we would not accept less, the supporters would not accept this."
Llorente confirmed last week that he would speak to his club after the European Championships to discuss his future.