ghd Australia is having a 20% off sitewide sale at the moment and you can stack the coupon to get it to 30% off most styling irons.
For example you can get platinum hair straightener (usually $375) for just $270 after sale discount & coupon.
https://www.ghdhair.com/au/hair-straighteners/ghd-platinum-plus-black-styler-hair-straightener-p-453
Coupon offer ends on 29 Mar.