I'm in Perth but I don't really understand what you're after.
If you're talking about a new bike we have several Honda dealers here.
If you're talking secondhand there are a few websites that list bikes in addition to Ebay.
There are also insurance auctions where you can score real bargains if you're handy with tools. A mate of mine bought his Busa last year in Melbourne, flew over and rode it back to Perth and registered it with no trouble at all for about two-thirds the price of buying one here. He sold it last month for more than it cost him.
If I can help in any way feel free to drop me a note directly.
Larry
lmoss@iprimus.com.au