I would like to recommend GS150, but I don't know what you mean by performance. For that reason you will have to decide yourself.
Parts are available from only three shops near Committee Chowk. Parts are not expensive, but "Made in Sultan da khoh" parts are not available like Honda and Yamaha. Compare the prices with Honda/Yamaha Genuine parts from Honda/Yamaha 3S shops.
Frankly, if anyone cares more about resale than the pleasure of riding, they should only buy Honda CD70.
But keep in mind a few things. Due to slightly different front wheel geometry, GS150 does not perform like the other bikes in crowded city traffic, like making sharp turns. Due to modern electronics, the performance can't be messed with, it won't go over 10,000rpm and it won't go over 120km/h.
I will repeat that it is the best bike for long distance travel available in Pakistan.