Half price sale on socks from Rock My Socks, a Melbourne based company. Orders must be of at least $20 (i.e. minimum order of 2 pairs of socks) for code to work and there is free shipping.
Appears to be 15 styles available. Personally I find the quality of the socks to be better than Happy Socks.
Sale ends tonight at midnight.
You can get about 5 pairs of socks for $8 at K-Mart.