Best place to buy console games in Karachi?

Hey Guys,
I wanted to find out where I can purchase used/new ps4 games in Karachi at wholesale rates. I'm looking for a market or a place which has different gaming shops selling games at low rates and not online ventures. I went to Rainbow Centre and Electronic Market but neither had more than one or two sellers of video games.

Basically I'm looking for the best place in karachi for purchasing games and where i can get a large variety. If you guys are suggesting rainbow centre than tell me some specific shops which specialize in console games