Harvey Norman is offering the Turtle Beach i60 Wireless Desktop Headset(harveynorman.co.nz) for $188 and the i30 Wireless Headset(harveynorman.co.nz) for $148. Free shipping.
This is the best price ever according to PriceSpy(pricespy.co.nz). Looks like the price fluctuates between $400 and $200 between the sales. Mightyape seem to be the only other retailer selling these headphones and they are going for over $400.
Engadget Review(engadget.com)
Techradar Review(techradar.com)
Via sangha on Geekzone(geekzone.co.nz)