20 m² kamer in Amsterdam

I am subletting my room from 20th July - 31st August (maybe longer). The price is 650 for the whole period (can be a bit flexible). It is 1 minute by bike from Vondelpark. The room is small but the apartment is huge - three floors, a balcony and a terrace. Most of the time you will have the whole apartment for yourself because the roommates are away for long periods of time (about three weeks) and then they return for a few days.