Krish - Since your a newbie, it will take time for your posts to show as your posts will turn up once the mods aprove it.
Finding a good second hand car is not a easy task. Please go through this thread here
http://www.team-bhp.com/forum/buying...r-india-3.html (ARTICLE: How to buy a *USED* Car in India)
I would suggest to opt for a Santro, since it will be extremely trouble free, however you can get a good Ikon 1.6 3 years old as well. Please lay down your priorities before you ask us. What exactly are you looking for in the car.