Just an FYI: the world’s most popular classified ads site, craigslist, just opened a dedicated site for Canberra today. It’s at http://canberra.craigslist.com.au/
I’ve bought and sold entire households worth of stuff on this when I lived in the US. It’s a very user-friendly site, and being non-commercial and community-oriented, ads are free, and you can include pictures and links.
To use it is to love it. And it makes a welcome change from having your listing delayed while someone checks it to make sure you didn’t include an offer to send pictures, like some other classifieds sites we won’t mention.
Craigslist is the seventh most popular site in the US by pageview counts: check http://www.craigslist.org/about/pages.and.peeps.html