Need to set up the equivalent of Autobay in India

I recently sold my skoda and at the end of the process I realized I didn't use the internet once. A deviance from acceptable behavior - I sometimes have to consult the internet to figure out how I am feeling. An act of buying or selling a used car is an activity that involves significant research and is always accompanied with that nagging feeling - am I being duped.

Like any other industry in India, there is tremendous need for a facilitator in the buying and selling of used cars.
Clearly there isn't one market leader in this space - I am not even aware of all of them and the branding/marketing isn't sticky. Carwale? carsdirect? I have no idea.
I think a brilliant idea would be to set up the likes of Autobay (South african company) or tie up with Autobay.
A marketplace for buying and selling used cars, a neutral agency to rate cars and ensure that they are not stolen or rebuilt.