I picked up a set of these on a run earlier this year and I have to say they're my favorite set that I own currently (I have Ducky thick PBT and GMK Dolch). I got the blank set and they're more of a dark grey than black. They look really good on the CM QFR.
I think $35 and $9 shipping to Canada is a great deal on keycaps.
Might be worth a look if you want some great PBT keycaps at a realistic price.
https://www.massdrop.com/buy/vortex-pbt-keycapsPS. I'm not in any way affiliated with this buy or product. I just really like the ones I got and keycaps tend to cost more than these, so I consider them to be a great deal, especially from Canada.