I was going to post this but I'm not really sure if it is an actual deal…
Anyway, Cotton On Airport West (Westfield) have 2 50% off racks, one with male and the other with female clothing. There are male shirts for $5-10 and t shirts for <$5. There are heaps of female tops and things for $2.
I got 3 items from the sale rack, and the assistant combined it with a further 30% off, which was supposed to be for full priced items only.
So try your luck cause there was a crap load of stuff.