Hi Amelia,
Have you checked ebay Australia prices for these machines? I trawl through them regularly, and they go for about $150-250 depending on the appearance of the cabinet (often) and sometimes the machine. I bought a very nice hand crank Sphinx for $25 two years ago but that was in a case. (And often the nice ones are in another state!) I know it's agony trying to decide, but there still seems to be a lot out there and they do turn up on ebay regularly.
good luck!