I got it from a shop in Rawalpindi, read their ad from olx. The address from the invoice is

Small sized heater 2.4 kW is Rs. 4,500. They had old model in 3.5k. A pin pack model, which was 15k!!
Mid sized for lounge 4 kW is Rs. 9,000. They had old models for less and also some pin pack ones for high price.
About performance, all of them work well. It is not cold yet, but the small heater warms up the room (18C to 24C) in about 10 min or less (its mid Nov). I set the temp to 24, so it slows down/standby at 24. Blows warm air again, when temp drops below, all are electronic thermostat controlled.
One classic thing that I miss is that 2-3 people cannot warm their hands/feet (haath saikhna) :). You just feel the hot air coming out of it, like AC. But, it does very good job in maintaining the temperature that you set.
And one thing that I enjoy is the warm heat on your feet, if you sit on a nearby chair. It just feels like you travel in car and set the heater in 
mode.