Friend, as far as the spare parts goes you will get them from Bilal Gunj (Scrap market Lahore), Chah Sultan (Rawalpindi scrap market) etc. The spare parts are available in abundance and basically you can almost find anything and in very good condition. However the spare parts are expensive. e.g Accord Front or Back Kabli bumper 30 to 40 thousand rupees, Kabli Ac Compressor 26 to 32 thousand rupees, body kit 50 to 60 thousand rupees. I am sure you get the picture.
As far as the resale value goes definitely it cannot match the resale value of a local manufacture car like Honda Civic / City and Toyota corolla since its price tag is higher if not the same as that of a e.g new civic. If you are buying it from an investment point of view then my personnel suggestion is not to buy it.