De Jong has been linked with Palace and Hannover this week.
However, De Boer told Ziggo Sports: "He's pretty expensive and not exactly what we are looking for."
PSV coach Phillip Cocu admits De Jong could be on the move this month.
He said: "Luuk is still here, but if there is an option for him that is interesting then I can imagine that he is open to it. And then we will also listen as a club and think about it."