How to find a house rent in Melbourne easily?

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My younger brother has reached to Melbourne recently and sharing with their collegues house with very difficulty. They are searching utmost for a seperate small house/apartment in Melbourne through some peoperty agencies but not getting their problem solved. So is there any other way to get a small house/apartment easily in Melbourne. Friends please help regarding this matter. If anybody is interested to give lease their house upto July 2011 please let me know how to contact and with their required house rent.