I'd have to look into the best way to ship to Australia. I know that USPS priority international is $76 US for a medium box and $35 for a small box. I can fit 6 units in a small box. And probably 50 in a medium box. Small boxes are limited to 4lbs, and medium to 20 lbs. I can tyry to get an estimate through my work for DHL, but I'm off until next year. Either way, It's not going to be cheap.