Thanks to airly for the original deal
As per airly deal, Optus currently having a 15% off sale. On the XS Max this means a total of $450 saved over the plan duration.
This plan includes 200GB of data as well as unlimited calls and texts when roaming Zone 1 countries (Asia Pacific, Europe, North America) with 4GB of roaming data.
Best price I have seen for a while, inclusive of the large roaming bonus and this and airly's post are great deals.
Edit: missed MAX, ignore my comment :)