If you know your headphones, you'll know that these are essentially the HD 650s that retail for over $600 NZD minimum. Even if you order from the US, a 650 will probably cost you at least $330 to 340 USD shipped. So any way you look at this, you are getting a bargain. The only catch is that you probably won't receive them until next year.
https://www.massdrop.com/buy/massdrop-sennheiser-hd6xx. Search for "HD 6xx review" on Youtube if you are in any doubt.