if you want one I'd pay Credit card as last time I saw these I paid Direct Deposit & missed out!
They have 150 ~ 200 Units on order from HP, if the is correct then the HP Au site may list these again, they were cheaper from there site.!
My mate has just put his last 3TB HDD in the unit, now has 5 X 3TB Internal & 3 X dual 2TB USB3.0 Raided Dual-Bay Icy-Box units (145MB/s) raid 0 (Model IB-RD4320STU30B), currently well over 25TB total in 1/2 of the space of a Mid-tower PC and 1/3 the power consumption!!