@muzammil
A used car is worth what someone is willing to pay for it. There are so many variables in the used car market that nobody can give you a precise estimate.
I was on the lookout for a 2011-12 top of the line spec civic in Rwp/Isl, couple of months ago. And just dropped the idea after doing a market research for a month or so. Cars that were worth buying (low mileage, almost brand new), owners were asking ridiculously high prices. 21 and above was the norm. For cars priced lower, they just weren't worth buying in my opinion. I have heard people saying that civic has poor resale but that didn't turn out to be the case. Cars in Islamabad were priced nearly 1 lac (on an average) above cars in lahore.
Good luck with your search and keep us posted.