where can i go for free or cheap theatre?

Hi there. I have never really been much into going to the theatre but i would really like to start going. I would like to go to watch some amateur productions that are either free or pretty cheap and in the south eastern suburbs of melbourne. Can anyone give me any tips of where i can go or even a website that i could check out for more info? It would be much appreciated! Please let me know by email jen6381@hotmail.com.