I'm curious why you feel that the classifieds are geared towards the USA? Will they not take the Australian zip codes? I've never tired but other than that, I don't know why they would be geared towards the USA. If that is the case and you have to put an as on the forum, it would need to go in the "Links to Classifieds, Ebay, Craigslist" forum.
Not sure about the value because I don't know how the prices there compare to here.