Chemist Warehouse seem to be clearing out their range of USN Whey products. Both powders and bars.
I picked up some of the 450g containers for $10, save $13. They had chocolate, vanilla and strawberry in store (Dee Why, Sydney).
Some examples from their website, however only available in store as they are clearance items:
USN 450g vanilla $10 (under half price) - http://www.chemistwarehouse.com.au/product.asp?id=66856&pnam…
USN 900g vanilla $20 (half price) - http://www.chemistwarehouse.com.au/product.asp?id=66806&pnam…
USN Peanut butter bar $1 (instead of $3) - http://www.chemistwarehouse.com.au/product.asp?id=75467&pnam…
not bad pricing. what's the expiry on them?