If you want to get the best deal on a used car look for week old adds on Kijiji without pictures. No one responds to adds without pictures and people who can be bothered to even put up pictures arent trying to maximize their value so they will be very willing to negotiate on price.
http://calgary.kijiji.ca/c-cars-vehi...AdIdZ382627111
Says price is firm but he didnt put up pictures so it isnt.
http://calgary.kijiji.ca/c-cars-vehi...AdIdZ382307377
No pics and the price is screwed up. Although probably out of your price range
http://calgary.kijiji.ca/c-cars-vehi...AdIdZ380761930
This guys add is two weeks old, never deleted it