honsla please honsla, not everyone is online all the time have some patience. The lahore registered car for sale in Rawalpindi & duplicate book. I'd say please cross check from the excise office lahore for validity of documentation, no matter if sale is direct from pindi resident owner i see nothing wrong.
HOWEVER
some time back @razasaeed Honda civic was stolen from outside his office in lahore recovered after approx 2 years, the person driving the car purchased it from a Pindi show room on duplicate book etc etc
money is yours, choice is yours Good luck