Using link https://www.amazon.com.au/b?ie=UTF8&node=5576689051 you can get $10 off items sold by Amazon AU by using code: AMAZON10
I used a standard search then sorted by 'Seller' Amazon AU and discount appears to apply to items sold only by 'Amazon AU' (but may apply to other sellers)
I found a number of ps4 games which allow $10 off, so I assume there are many other items
E.g Uncharted Collection PS4 delivered for $24.99
Combo a few items and take advantage of free shipping over $50
If it doesn't appear to apply, try review order and see if it applies on total.
Uncharted Collection (PS4)
ASSASSIN'S CREED UNITY SPECIAL AUS PS4
NEED FOR SPEED RIVALS PS4
$57.99 delivered (if free shipping selected and code used)
I have been a long time user on amazon.com and code appears to work, so not sure if it is limited to new users only.
Mod 5/4: Available again (thanks doweyy). Deal had previously expired 25/3 ~9am.