Bayern Munich have warned interested clubs over the fee they will demand for Franck Ribery.
Ribery has admitted hopes of one day playing for Manchester United, Chelsea or Real Madrid and is now weighing up his future at Bayern.
Bayern chief Uli Hoeness values the former Marseille man higher than AC Milan star Kaka.
"If Kaka is meant to be worth 120million, then Franck Ribery is worth 150million," Hoeness told Eurosport television.
"We would only perhaps start to consider selling him at a sum like this."
Hoeness was speaking at the end of Bayern's 2-0 friendly win at second division side Kaiserslautern.