Do check for marvans shop in your city or nearby city bro. Buying any apple products online from random websites or instagram, facebook, olx and quickr ads without visiting their shop in person is not recommended. its not safe.
If they have shop locally in our city then we can visit and claim the same offer price and buy the product safely.
otherwise buying from amazon or flipkart and following online safety tips like recording full unboxing video will help safe purchase bro. if there is any problem we should be able to claim the money we paid.