Ebay.in has a very wide range of products available because it engages a lot of local sellers. Many products are available on this site only and not on other ecommerce websites. I bought battery for my laptop and it was available on ebay only.
Lots of discount coupons are available, do make use of them. Easy return policy is available. But product delivery may be late and unreliable, my package was delivered by local postman. Also pictures of some products are not clear, do make sure it is same product you want to buy.