For a central locking system:
12-20k.
For power windows :
10-28k
For Fog Lamps :
2-7k
For side skirts :
3-12k
I say sell ur Xli @ v. good price as demand is HIGH!
U will get 820 k + for 2005 model or more
U will get 730 k + for 2002 model or more
Lets say 770k and buy Gli @ 970.
So u spend 200k to get all these things fresh from company and any issue you take to company and they will deal with it. And its all factory fitted. U will need to add fog lamps and side skirs urself.
Salaam. I would sell it and buy City but oh well, have it your way!