If no one on the premium e-mall on PG is satisfying you then I'd suggest Karavaan Games in Saddar Mobile Market.So, if you were to buy a ps3 in karachi - lets say with the move motion controller, where would you buy it? Rainbow center? :s
Best price, always original and checked...
Other than that I'd really recommend SEvolution for getting a PS3 with the cheapest of price.