Searching past deals, both appear to be cheapest so far.
Make sure to select ships from Australia - Delivered by 07/09 or Full Refund
To get above prices claim $2.83 seller coupon and enter promo code RLCFLASH5 at checkout for a further $7.07 discount.
Reolink Argus Eco w/ Solar Panel A$88.63
Reolink Argus 2 w/ Solar Panel A$115.07
Prices in title inclusive of GST
That Eco is a good deal, cheaper than the Amazon deal I got a few weeks ago