Man! That's REALLY cheap if that's in NZ dollars. What wholesaler exactly are we talking? BDT or Rennaisance? And what brand is this GT? Fantastic deal. Most 6800 NUs are retailling for between $600 - 660 NZ (I paid 660, but mine's passively cooled, which is nice if you like that sorta thing).
The cheapest GT retail value is (as far as I can see) NZ$790.
Erm.. just check www.pricespy.co.nz