http://www.techradar.com/news/dell-visor-mixed-reality-headset-is-available-to-pre-order-ships-october-17

Dell has begun taking pre-orders for its Dell Visor mixed reality headset, one of the most high profile headsets that will be coming to Windows 10, and which supports Microsoft’s mixed reality initiative. The Dell Visor is set to go on sale on October 17, which is the same day that the Windows 10 Fall Creators Update will be made available to download.

In the US, you can pre-order the Dell Visor from the Dell website, and it will cost $349.99. You can also buy the headset with two motion controllers for $449.99, with the controllers being sold as a separate package for $99.99.