Hi Tony,
We have some great suppliers from Australia in the directory but before you start searching for suppliers, I suggest that you first find a good market. Stay away from a market that's too competitive or oversaturated (e.g. electronics). To find a good market, you can start selling stuff from around the home so you will know which items sell well or use eBay’s completed listings to find products with high success rates. You may also check out eBay's Want It Now (Link hidden: Login to view) so you will know what items people are looking for and if there are ebay members who are already selling it (remember the business basic demand vs supply). It is very important to do a lot of research, make a lot enquiries before jumping into something that catches your eye.
It's great to have you on board! Have a look around the site. If you click on 'Education' tab, you will find a lot of great information on what sells well on eBay, finding suppliers, etc. Search the forums (there are a lot of great information here) and if you have any questions, just post it here or contact us directly. We will do our best to help!
All the best!