Yeah, you'll find plenty of Aussies floating around the forum here, quite of few Kiwis as well, so the Southern Hemisphere is pretty well represented : )
I'm in Brisbane myself, and doing just fine thanks VHC. Regarding my online sales, I use ebay and stick to mostly second hand items that are sourced from everywhere, from Auction Houses, to Garage Sales, Weekend Markets, you name it, and I'll use it as a product resource : )
Big fan of the second hand market because if you can talk a good deal, you never struggle to find stock, and you always have something different to offer, and that generates return customers : )