It is a decent website if you are an experienced buyer.Anyone can see products on ebay so that is why people end up getting crappy products but you should realise that if you're getting something for 100 rupees and it's real price is 600 then obviously it is gonna be a FAKE product.
Ebay return policy is very weird if you have a manufacturer's warranty on you product then you can not return the product and ebay is out of the loop.
SO WHENEVER YOU BUY A PRODUCT HERE THEN PLEASE SEE WHO THE SELLER IS AND HOW IS REPUTATION IS THERE ON EBAY, THEN YOU WILL SURELY GET A GOOD PRODUCT.
Verdict-Shopping in ebay is like going to a departmental store where you have both crappy and amazing stuff, so you gotta be very careful about what you pick