Went in to pick up this deal: https://www.ozbargain.com.au/node/228506 (only $5 at Bondi Junction mind you) and found a couple of other deals, mainly this tower speaker for 10 bucks.
There's also a smaller bluetooth speaker for $5 (although it looks like it's made of a cardboard tube) and a globe (of the world type) for $5
Edit: The sign said it was down from $50, bit have seen things like this for between 50-80 over the past few weeks