This is the best price for Sniper Elite 3 currently. The store, "City of Games", is based in Melbourne and shipping is free.
I believe this is a UK import and is thus fully compatible with Australian consoles. The price is advertised as $58.95 for the PS4/XB1 versions, but the coupon code "WELCOME" will knock 5% off the price.
Kudos to the Whirlpool gaming forum for the link (http://whrl.pl/Rd0RDy).
Update: the price has increased slightly to ~$58.85 (with the coupon).
May be the cheapest yet but still a high price …