Just saw this on the CW website. Great deal for protein powder. $15 per KG - not sure if it is close to the 'best before date' but Whey does last a while if stored correctly.
The photo says 1.2KG so it may actually be more than 1KG.
As per usual with Chemist Warehouse, shipping is a flat rate of $5.99, but free for all orders above $50