If you wisely skipped the 25% off from earlier this week, this is what you've been waiting for. G-Star Australia have entered into voluntary administration (because they can't pay the rent) and so everything's on sale.
From memory, WA stores are owned separately so they're exempt from the sale but sandgropers can still buy online.
Brilliant,this will come in really handy. Been eyeing on couple of jackets. Thanks OP