firstly Stick to one Car, research on that car, e.g Vitz, search the whole Pindi Islamabd Market, compaire the pricing, also if you have time Visit Peshawar Market too, search Sunday Jang Advert, VITZ is a very good option at the moment in such Budget, Inshallah you will find a good vitz, but spend some time, and don't be hurry.
if you start comparing JDM and Pak Cars you will never find a good car, so don't make your self confuse.