Just got back from Top Ryde BigW and noted that GTA V is $48. Website still shows $85.
Seems like the lowest the PS4 version has been (too lazy to take a look at the XBONE version, but probably the same).
Enjoy it after grabbing your copy of $15 Harry Potter screenplay.
Could have got it for $20 last year
https://www.ozbargain.com.au/node/222849#comment-3248982