Retails for $599 in Aus, and currently $445 AUD at Amazon US (with Prime), down to around ~$335 AUD delivered with Prime from Amazon Germany.
Without Prime, currently $423 delivered from Amazon Germany.
If you're looking for a top-tier gaming headset that doesn't look out of place doing noise cancelling duties at the office and can handle simultaneous Bluetooth, you're probably comparing these, the Arctis 9 Pros, and Audeze Maxwells. Some really helpful reviews to help you decide:
https://www.youtube.com/watch?v=K6i8m62aFCI
https://www.youtube.com/watch?v=DxZyp4vJL64
I bought these about 18 months ago on an Amazon warehouse deal. They were great until about a month ago when the batteries stopped charging.
Turtlebeach support were difficult but Amazon refunded with no issue at all.
Ended up spending a bit more and got the Astro A50X for $550 (JB price matching Centrecom) and they are fantastic