That is more than the previously reported buy-out clause for the Tottenham Hotspur star.
The Algerian played in a deeper role during his time at White Hart Lane.
The German youngster was linked with a big money move to Spurs in the summer.
The Algerian has been in fine form for loan club Schalke 04.
The Tottenham Hotspur-owned midfielder scored for Schalke against Mainz in the Bundesliga on Sunday.
The Algerian was allowed to leave Tottenham this summer.
Tottenham loanee Nabil Bentaleb kept his place in the Schalke side despite a glaring error at the weekend
The Tottenham Hotspur loanee is already a hit with his new fans.
The Tottenham Hotspur-owned Schalke midfielder played against Bayern Munich in the Bundesliga on Friday evening.
Tottenham Hotspur allowed the Algerian to join Schalke this summer.