there is a big shop opposite orphanides in kapparis i was in there last may, they had the nintendo wii xbox 360 and new playstation not sure of cost though.
ps its not just a computer shop it sells loads of different stuff
There's a very high-tech shop right next to "epi-topou" cafe but I can't remember its name. It's a 3-4 minute walking distance from the Cyta roundabout T_C. Very close to you.