Huntelaar, 29, is out of contract at the end of the season and has been linked with interest from a number of clubs across Europe, including Tottenham Hotspur and Liverpool.
"He's had offers from England, Italy and Spain but it's also possible he could stay in Germany," said agent Arnold Oosterveer.
"He wants his future planned by the winter. In the next 45 days he wants to know his next project and it will be decided by his football ambitions and not by money.
"His dream is to fight to win titles in Europe and to have chances to be successful, because today he is one of the best strikers in Europe."
Huntelaar scored 48 goals in 47 games for Schalke last season.