Samsung.com has HMD Odyssey - Windows Mixed Reality Headset for $424.99 + Free Shipping when you buy with UNIDAYS discount (edu email required).
sign up for UNiDAYS with an edu email to get the discount: http://www.myunidays.com
Additionally, you can receive 10% cashback through Discover.
Regular Price: $499.99
UNiDAYS: - $75
Discover: - $42.49
Final: $382.5 + tax