Wrong again. I DO live here in Istanbul and I DO know the rental markets in Istanbul because it is my JOB to know.
This week alone I have been helping clients find flats in Bostanci, Suadiye, Cadde Bostan, Fener yolu, Moda, Bebek, Ulus, Etiler, Levent, Atakoy, Florya, Basimkoy, Istinye and Tarabya.
Now take a look at a map and you will see that how much of the city I cover which puts me in a better position then you and most others on if you are paying a lot or not. Quite a few of my clients are Turks so dont come to me with the "my turkish friends said blah blah" card.
I am not following you around but just correcting the wrong information you are putting out here.