I was just about to buy PS plus and google found me this deal of 15 months for price of 12. It is a multicountry deal that includes Australia.
First deal posted so hope it helps some people.
Note:
PlayStation® Store only, excluding all other PlayStation® stores and in-game commerce.
15 month PlayStation®Plus membership for the price of the standard 12 month membership. The membership will continue indefinitely until cancelled and you will be billed in 12 month periods at the then current full PlayStation® Store price.
Further terms on link:
https://www.playstation.com/en-au/legal/psplus15for12/
I'm disgruntled with PlayStation plus the price has gone up with no added benefit. It's rarely on sale and when it is I seem to miss out. I purchased PS+ for my brother 2 weeks ago and now they have a incentive to buy it once again after I've already purchased it. I was a loyal subscriber during the PS3 ERA because it actually had value. But in typical Sony fashion they are falling behind the 8 ball in value for money.