"I've had my worst season since I joined, I don't want to extend my contract because it would mean they'd be my final club outside Holland. I have played in Spain and England, so maybe it's time for somewhere else."
Seems pretty clear to me what the Dutch defender wants, now it's just up to Roberto Martinez and Everton to find a good deal. Fortunately for the club, there should be some buyers for Heitinga despite the fact he wasn't a regular first choice options last season just a year removed from being one of the team's best options in the back.
Heitinga joined Everton in 2009 from Atletico Madrid for €6.8 million and has a year remaining on his contract with the Toffees. If he's decided to start making his feelings public, it's a good time to sell the defender on and get what you can back into the coffers to reinvest in other players. That's certainly better than having a potential malcontent hanging around and then allowing him to leave on a free transfer.
There have been several reports linking the defender to Turkish club Fenerbahce, the same club who purchased former Everton defender Joseph Yobo last year.