expired [PC] Origin - Battlefield 1 Standard Edition - $12.49 AUD/Battlefield 1 Revolution Edition - $22.48 AUD - Origin
According to ITAD this is the all-time lowest price for the standard version of Battlefield 1.
The Revolution Edition is a bit cheaper on Amazon but it seems to be unavailable/out of stock - I have not tried using a VPN so maybe it is available then. In that case it is a bit cheaper there at about $20.19 AUD.
Sale is until 21 June 9pm PDT.