I was recently in Australia and also happen to have a Rode NTK, so maybe I can help.
I got a great deal on mine $429, but I think the standard is around $500 last time I checked.
Assuming a .72 to the dollar exchange rate (which I have no idea if that's current) then you're in the right range. Just divide 1 by whatever the current exchange rate is and multiply that by $500 and it should give you a pretty good idea. Hope this helps.