bro cars with P registration usually sells 40-50k below market price. This series was issued to auction cars as well cars which were transferred to karachi from some other city.
Its better not to get into this deal, bcuz ppl hesitate to buy P series, and whenever you need to sell it you'll face it.
P is for PANGA
Moreover, vehicles with N series with the plates of new desgin also falls under same category. all AA series was same. Q was issued to vehicles recovered from stolen/snatching. AC is for auction, number plate lost, recovered and auction vehicle.
PG series was for yellow cab taxi scheme.