Even if you aren't looking for a Windows Phone Expansys is a good site for all kinds of unlocked devices. However its a good site to get unlocked windows phones that are not offered in Canada like the Lumia 930, 1320, 1520, Blu Win HD etc.
Would be nice if Rogers offered more Windows devices. Kind of pointless now though with new Windows 10 devices being announced possibly this summer. However it would've been nice to get the Lumia 930 or HTC ONE M8 for Windows as a flagship device as the last true Flagship Windows device offered was the Lumia 1020 in 2013. Sure the Lumia 830 is a decent budget flagship, but I wasn't about to use my device upgrade on a side-grade to that device when my Lumia 920 works as well or better in some regards to the L830.