Eintracht Frankfurt chief Axel Hallmann insists Randal Kolo Muani will only leave for huge money.
The France centre-forward has been linked with Bayern Munich and Manchester United in recent days.
Kolo Muani is expected to be on the move this summer.
Hallmann said: "Kolo Muani? When I look at the international market, I imagine a different number than 90m - more than this.
"He has a long-term deal. My absolutely ideal scenario would be that he stays with Eintracht."