Keane, carwale.com is the biggest second hand car sale website in India besides also being the largest automotive portal in India.
Listing costs Rs. 800 but its worth it. I got a premium of Rs. 20,000 on my Alto over what dealers and Maruti True Value was offering. Besides, my car got sold off in 3 days. So at the end of the day, an investment of Rs.800 yielded an extra Rs. 19,200. I strongly recommend it.