Well Samnabad has a 25-30k margin for bargain on weekdays. This margin increases on sundays and fridays since there are a lot of outsiders(people from outside Lahore) who come to buy cars.
The key is patience. You'll get a good car, just don't settle for anything less out of frustration.
It took me 3 months to buy my VTi 2000. Paid 795,000 for it. Haven't spent a penny on it since I bought it about 8 months ago. Absolute gem of a car. I saw atleast 80 similar Civics, but the patience paid off.