Get something from Massdrop like a Pok3r and pray not to get hit by the customs. There are really not that many options unfortunately. Sometimes there are used ones on /r/mechmarket so that would be your cheapest option to get something decent.
I can say from firsthand experience that you will most likely get hit with customs fees in Canada when buying through Massdrop. I bought a POK3R a little over a year ago, and I ended up paying something in the $30CAD range in fees.
The classifieds here or /r/mechmarket are your best bet in Canada for a reasonably priced board that isn't one of the standard (MX blue, red, or brown) big manufacturer boards (Filco, Ducky, Corsair, etc.). I've had international sellers on both GH and Reddit offer to pay half the shipping costs in the past, so if you're not averse to buying used, I would just check the marketplaces regularly.
Depending on your location, you might get lucky on Kijiji as well.
Good luck.