According to me flipkart is the best website for online shopping in India. It has a vast range of products on their website.
You can order many thing at a really low cost then other online shopping websites. They offer discounts on almost every product available on flipkart.
They also have offer sales from time to time. They deliver in max 5-6 days and they also have 30 days replacement policy so you can also return the product if you are not satisfied.