It all depends, new games I tend to buy from various places, in-store/online(amazon,publishers website etc.)
As for accessories I get from anywhere, mostly any place that sells electronics, I am not picky.
Same goes for used games, I recall saying this once...
Looking4Moar wrote...
Pawn shops, as odd as it sounds. Sometime you can find interesting shit there, a few years back I found Final Fantasy II and III for SNES (Good working condition too) and got them both for $10USD.
Now that I think about it most games/accessories etc I get, maybe 30% come/came from Gamestop and similar type stores.