What you have to remember is that currently on Ebay there are over 48000 leather purses listed - over 5000 in Australia. People have so much choice and can buy similar purses to your stock. How does your product compare - how do your prices compare. With the number of items you have compared to the number available for sale on Ebay you have actually done quite well to sell one. When I started out on Ebay I was selling books - with 600 listed I'd only be selling 6-8 a week. 

Do a market comparison - how does your product compare with other similar items being sold. If you were a buyer would you buy your own stock at that price or look at another buyers product.  Look at your listing descriptions and formatting as well. Currently the text is small, black, no particular formating or template to jazz it up and has a number of spelling and grammatical errors. All these add to the buying experience and properly done they do lead to more sales.

Make some changes - see if they work - keep at it and don't get disheartened. When starting out there is a lot to learn but you'll get there.