Nintendo 64: Hofer (Aldi) Austria, if my dad is right.
Gamecube: Interspar Austria
Wii: Amazon
Wii U: Amazon
PS2: X Games
PS3: Amazon
DS: Libro Austria
DS Lite: Amazon
3DS: Amazon
Gameboy: some small private retailer
Gameboy Color: ? (a birthday gift)
Gameboy advance: Libro Austria
Now, most of those shops I listed are tiny compared to Amazon or Wallmart. Acutally, I think nobody, who's not from Austria or Germany, will know any of them
Lyrics: He He He He Ha Ha Ha!