Brother 2007 2.0D with around 120,000km is for about 7 lac and 2.0D Saloon which comes with airbag and ABS with less than 100,000 km is around 7.5 lac.
2007 XLi CNG wali with 100,000 km or above in normal condition is for 7.5 lac and petrol driven around 75,000 km driven with only bumper changes and minor scratches is for 8.0 lac for white color other colors are little less.
For 1M 2009 2.0D is available here.
In Lahore too these cars do not worth more than 1M max no matter if its an Altis auto or or so called 300 km driven XLi claimed to be run on rocket fuel.
I suggest you should buy from LHR if the prices are really that insane in Islamabad which could be as you are being robbed for your hard earned money for just the reason that you opted to live in few hundred kilometers away in the capital territory.