Affordable places to stay near the University of Bonn

I want a place to stay as I am joining the University of Bonn in October for my masters course. It will be great if I could get an place nearby with basic necessities. I don't want to stay away from my University but I am ready to live in a smaller place. An attached toilet to my room and a common kitchen will be good. I would also need a washing machine if possible. I am not a person who has much needs. I just need a small, cozy apartment which is near to my University. I am on a limited budget hence it would be great if I could get a room with a maximum rent of 250-280 euros and 0-5 kms away from my University. Money is negotiable if the facilities provided are great and the place is near the University. I am hoping for a positive response.