Some decent deals at the (new?) Brisbane Airport duty free marketplace online. Some of these are on products that rarely go on sale. Likely a few brands I've missed but have attempted to summarise the bargains which I'm familiar with below.
*40% off Maui Jim and Oakley sunglasses (and a few other brands) - apply code at checkout for 40% off.
*40% off Longchamp handbags - prices as marked
*40% off Jo Malone, Clinique, MAC and other beauty products - apply code at checkout for 40% off
Shipping seems to vary, can't see what the free shipping threshold but looks pretty standard.