Rainbow Six Siege Gold Edition (PC Uplay key) is currently 69% off at Amazon and includes the base game and Season 1 content which is the best discount this game has had yet.
In addition for those looking at the Season 2 pass (Uplay key), that can be had at Greenmangaming for $US 23.99 (~$AU 33.50) which is 20% off RRP with the VIP discount: https://www.greenmangaming.com/games/tom-clancys-rainbow-six… (Note: The VIP discount becomes available once you login to your GMG account)
In total this comes to ~$AU 70 for the "Complete Edition" which is currently discounted on Steam at $US 77.18 and is normally $US 98.95.
P.S. As per standard to buy on Amazon US you will need a US account/address setup
Nice price for base game and the Year 1 operators; this game is fantastic by the way, urge everyone to give it a go! Surprise hit.