I figured I could through down some info for canadians out there- Superstore has had a clearance rack through the entire holiday season, likely there are still some games left on it. Excess stock from the last 2 years for all 3 systems , I think everything was 20 bucks.
Also, give a checkout of your local Rogers Video rental stores, they always have used games for sale, varying in price depending on there popularity. One of my local stores has R Type Final for 15 bucks, noone else seems to want it so if its still there this weekend I may pick it up....
Also, stock is likely REALLY limited but London drugs may still have a scant few Console games left depending on location, prices from 10-50 dollars depending on the game, this has been a clearance for a good 2 years now though so chances of finding anything are probally very low.
Finally, Zellers had a 10 dollar clearance bin with Onimusha 2 , shenmue 2 , Disaster report and a bunch of PSone games.