WM - Winter Tires Clearance, 40% OFF - Dec 26 - 31
Walmart has a tire sale running from December 26th to the 31st. Select winter and A/S tires are 40% OFF.
I just picked up a set of Dunlop Graspic DS-3s for under $300 all in, 2012 manuf. date! Each is around $59 in our size (185/65-15). My store in Barrie also had the Marshal I-Zen Wis (KW19) (rebranded Kumhos made in Korea) for a dollar less. Not sure I would personally bother with any other brands though.
TireRack: $304 + shipping, duties, tax, etc
1010 Tires: $455.96 + shipping, tax
These are rated as *Very Good* by the APA winter tire guide: http://www.apa.ca/WinterTires2012-PassengerCars.asp
Edit: There is also a $60 MIR, but not available for Walart purchases. PM with Canadian Tire?
This is by far the best price I've seen, especially at a chain store and for fresh tires, not some old stock.