Mines on the market in WA, presently on Gumtree, and yes you do get scammers, especially if you list phone numbers (emails have to go through gumtree and they onforward them to you, the enquirer does not get your email address and replies through Gumtree to them are the same. Even then you get some that try it on, but there is a report link to Gumtree on the message if it looks suspicious.

Trading Post (a cost but not too expensive), Quokka as Delta said, State newspapers (eg; Sunday Paper), carsales.com (add expensive at $99 basic). Recently I spoke to 3 different car and RV selling yards (not about mine) and all said the market is very depressed at the moment and the worst they had ever seen in WA. This was also told to me recently when I enquired about selling mine on consignment, you practically have to give it away (with the one I tried, you agree on a set base price (what you get) and they add their cream on top, however if the price you want is too high once they have added their bit they won't take it on unless you drop your price. Suggest not at good option at the moment.

Good luck with the sale! Sign on the vehicle might help too when running around shopping etc.....