I have a room on Ergenekon Street at Osmanbey Sisli.
Atteched, you can see photos of room and flat.
There is one small private room and another room for share with two beds. Other expenses are included in price (monthly invoices of electricity, water, gas, internet etc.)
Public transport is great. You can take the metro line and go to Taksim in 5 minutes. It is only one station away. In Taksim you can find lots of restaurants, cafes and bars, so its great for night life and it is easy to come back home late. You can also go to historical peninsula in about 20 minutes, where you can explore the Ottoman and Byzantine architecture. Istanbul is a great city.
You can contact me after you make the reservation the details will be revealed.
I quarentee that you will enjoy being a flatmate with me like olders.