Dick Smith - Sony Ericsson G502 Mobile Phone Reduced To Clear - $99 (Was $169)
* 2 MP Camera
* MP3 Player
* FM Radio
* 4 GB Expandable Memory
* 3G Compatible
It's locked to three, (which I'm on at the minute anyway) but you can get it unlocked for free I think anyway at a few places online, or take it to a shop and pay to get it unlocked if need be. It's also on the three/3 website too, but you have to pay $10 postage.
The next cheapest I can see online is $129 from one retailer, then the price jumps to about $160ish everywhere else.