Olx.in is india leading website as far as second hand products are concerned. The beat thing about it is that you can post a free ads without any hassle. The more is that you can add photos to it. As compared to tradatiinal aporoach olx can give you a greater price for your product as there is a wider no of people also the people who are also intrested in buying your product.
Apart from ads you can also have chat from the buyer and can display your info only when you think that it will buy the product.
I future we will be seeing the second hand market in the boim and olx will be at top of it