Was browsing around Big W, found these. Marked down to $5 a Pair. Big W seemed to have a 25% off the marked price of summer footwear promotion, so they scanned in at $3.75 a Pair. Normal price is $15 a pair
I don't think it applies to whole havianas range though, only seems to be the plain one which features green/yellow striped layers in the sole. Available in 3 colors-black, gray, and navy blue.
Found this in big W Calamvale Brisbane. Could not find any sizes over 7/8 luckily I am a size 7/8 thong so I bought 5 pairs.
Not sure if this deal is across all big W shops or not
that's a bargain! https://www.havaianasaustralia.com.au/Products/Brazil-Black ($24.95+shipping)