40% annual subscription discount at Ancestry.com.au. At least on Heritage UK Plus (UK and Australian data). I can't see the offer online but I emailed to ask about discounts and was told of the 40% discount from 249.99 to 149.99 for 12 months (renews automatically if you don't cancel). They added a "code" to my details and was asked to phone to set it up and pay. Contact details on the link.
I looked at UK site that charges GBP119.99 (equiv to A$205) for the Premium Subscription but it doesn't include Australian data as standard. The Australian equivalent is Heritage UK Plus at 249.99 but at least it includes Australia AND UK. With the current offer at 149.99 its a bargain until 2nd Jan 2017 !
And if that doesn't work for you, Cashrewards are doing 20% discount for ancestry.com.au (first purchase only)