I just bought a ps3 around christmas time (and just made this account) and I suggest you take a look on the futureshop and bestbuy sites since htey always have deals. I usually buy my games there and since theres so many old games, theyre all cheap. I picked up assassin's creed,bioshock and oblivion all for 40 bucks. and then a little later, I got MGS4 and dead space for 40 bucks. There's others, depends what genres you're in to.
also they give free shipping if you spend 39$ or more (although so does amazon.ca so don't bother with amazon.com where you'll be charged shipping and border fees (insanely high)...if you're too lazy to go to the store lol
EDIT: also theres the controller and uncharted or ratchet bundles for 60 bucks. both games aloen are 30$