Anker Global Store @ AliExpress is currently reducing the price of Anker PowerPort 6 by 29% to $23.96 USD (~$32 AUD).
Currently, Anker PowerPort 6 is sold at Amazon for $31.99 USD and is not available to Australia. It also sold at eBay for $49.99.
It has good review on lygte-info and the wirecutter.
Remember to use cashback, or through iOS app or Android app for further discount.
Be reminded, this USB charger is sold by Anker Global Store located oversea, thus the charger does not have Australian RCM mark or C-tick safety certification.