If you want guaranteed brand new product then I'd go to iStore but if you have low budget, then look in olx. Hafeez center has shops that sell macbooks but they are not trust worthy and usually charge a lot for a machine that has no garantee to be original. I bought my macbook in 2013 from iStore near H-Block DHA. It has been working great so far. I spend around 1.5 lac for retina model with core i5. They only deal in macs and provided great service. Its been 5 years since and I haven't had any issues.