Single room in a shared flat

I'm looking for a room in the city of Tubingen. I'm 22 years old student and I want to find an accomodation near the 'Institute of Medical Psychology and Behavioural Neurobiology Otfried-Müller-Straße 25 72076 Tübingen'. I have to stay there from the beginning of January to the end of June. I cannot afford costs, just for the room, greater than 400 euros. The place where I could get an accoodation should be well-connected by buses to the Neurobiology Institute, even at night. I prefer a shared flat cause of the cheaper price, but i also can consider other options. The only choice I don't want to consider is the shared room. If possibile, near the accomodation, I would like to have a market/supermarket, a bank, a postal office and a pharmacy. I cannot view neither the accomodation or the landlord until my arrival in Tubingen, so contact me by email or even by Skype.