Yep. You've posted this in the 'For Sale' section...pretty much the 'classifieds'!
You may have more success selling through gumtree or through bike sale sites on Facebook. I follow several bike sale sites on Facebook. Some specialise in bikes and parts just in Adelaide. Others in Vintage bikes pre 1993, others just Dragsters, mountain bikes or just general bike and bike stuff Australia wide.
Unless your bike is special, unique or well priced with good photographs it may attract little attention.
I'd add that Bicycles Network Australia would be worth a shot if it's a road bike, they are a more natural home for road cycling than this site.