The Lumia 950 sells for $749 while the Lumia 950 XL sells for $849, and the latter phone comes with an offer for a free Display Dock. The offer comes in the form of a promotional code that is obtained by signing on to the Lumia Offers App on the Lumia 950 XL with a Microsoft account by January 31, 2016. After that code is received, users can redeem it on the Microsoft Store site to get their Display Dock. The code must be redeemed by February 29, 2016.
As we have previously reported, no Canadian wireless provider has plans to sell the Lumia 950 or Lumia 950 XL, meaning those residents will likely have to pay full price up front to get either phone.
Thanks to Milad for the tip!