Car Wash on Road in Blue Area Islamabad.

How much one should pay them to clean the car just from outside, no soap, no shampoo just water and cloth?

he didn't even touch the tyres, just washed with cloth in 10 mins so i offered him 200 but he said too low so i gave him 300 but he said sir minimum 500, i lost it and i was like you moron we pay 500 at the service station where they pay rental, soap,shampoo, pressure wash and they clean from inside too, he said sir OK take this 300 too, he left it on my bonnet, i was like OK so i drove off and gave it to someone else :-)