Thank You. I purchased a Lenovo laptop in the last week from Flipkart. Though I didn't get much discount from this site, the quality of this product is good. (Trackpad doesn't work for one time.) Laptop bag is not from Lenovo but it is ok. Overall the purchase is satisfactory and the product is awesome. I will write a review about it after few weeks of experimenting.
Just to purchase that laptop I made a sort of study of different e-Commerce sites available in India. These are my findings. I made a couple of calls to them and some laptop manufacturing companies.
Flipkart: Quality is Excellent. Purchase is smooth and satisfactory. Customer service is really awesome. I made lot of calls and asked many queries, they answered patiently. On the other hand they don't ship items to remote locations. They can't handle early delivery during festive seasons. Only items from WSRetail will be delivered a bit early before the delivery date. Overall you can go for it for any purchase.
Amazon Quality is awesome. I Purchased lot of books, toys and a duffel bag. All are genuine. Strong point here is they ship articles to the remotes areas also. Even in the festival season, they shipped a gift article in just 2 days after ordering. Minus point is their payment gateway. I have to do same transaction 3 to 4 times to make it confirm in the last attempt. Moreover, they don't have much variety of products. But their service is equally good. I just want an article to be delivered on a particular day a bit early. They have done the same in a few lines of chat. Overall it stands equally with Flipkart in most aspects.
SnapDeal They came up with lots of discounts for electronics compared to above two. Though they have done lot of promotions, they couldn't catch the nerve of customers. Customer service is the major drawback. They don't answer all the questions. One has to know the difference between dispatch date and delivery date before they go a purchase here. Generally, they take long time to deliver products. Quality wise products are good. My friend got a laptop 2 years back and is in excellent condition since the purchase.
Ebay I couldn't gather much information about this one. Though they gave huge discounts on laptops, they are not impressive with product details.
Finally, When I called Lenovo India and HP India customer support, they mentioned that Flipkart is their official product seller and their products are 100% genuine.