Amazon is providing the iteams cheper compare to all other websites like filpkart and snapdeal, ebay etc.
The delivering time is also fast.The most important point is they have too much variety in particular product .
I recently bought 2tb seagate hard disk(usb 3.0) it was delivered to me with in 4 business days through normal shipping, even I did not have to pay for fast shipping and delivery was also free.
One more point is that they give cash on delivery option to most of their items compare to other websites. and they have good policy to return the item if there is any problem.