you should not give more than 3 lakhs for a car in such condition, after restoration, supposing that the car is in perfect condition, keep in mind that the car may sell for around 4 to 4.5 lakhs. Not more than that, the max for this shape in the market is 4.5 lakhs, that too for cars with completely original paint or with little touchups, original engine in good condition and less mileage. After 4.5 lakhs, the 6th gen civic is easily available, so the market probably wont pay more than 4.5 lakhs for a 5th gen.
As per the market of Pakistan, people deduct the car's price on swapped engine and repaint. Also, i have heard some people of having reservations when they come across that the car is japan assembled ! You know, people are derived by their mechanics, and those masterjees dont like JDM 5th gens.
If u want to keep the car yourself, its a gem, but if u are restoring it to sale it, the idea may not be that good !
P.S. I am telling you the scenario of Karachi, it may be a bit different from that of Islamabad.