[quote name='AlleyKat']why does everyone go to Game center ?[/quote]
Not only is there a serious lack of quality used mom n' pop shops in Toronto, but Game Centre usually warrants its reputation. Easily to bargain, haggle, special ordering, a variety of rarities, and decent prices.
Gamerama's(Yonge and Eglinton) employees are aloof to the meaning of customer service, never mind the prices. Game Shack's selection is limited, albeit they pick up the odd title from time to time that's worth a look. Video Games Plus (Yorkdale, sorta) is a good place, but too far out of the downtown loop to warrant my interest most times.
The next best place in the GTA, in my opinion, is Game Now in Oakville. Prices might make you cringe a little, but their selection of used games, not to mention systems, is not to be questioned. Stores that tend to carry little import nicknack's and toys earn extra kudos in my book as well.
My two cents.