There is the Bentleigh trash and treasure every Sunday morning in the railway car park next to the station. This is the closest I know near you. I have been there a couple of times, many years ago now, to get rid of stuff and got rid of most of it in a few short hours. See if there is anything on:
www.shopbentleigh.com.au they might have a contact for you.
Problem is you will need to be able to fit all the stuff in the car to get it there. Garage sales are probably the easiest, we are hoping to have one soon but probably to late for you to bring your stuff along