Not necessarily, you can always buy from sellers with good feedback. I prefer Ebay over snapdeal.
That's good for you, personally i never buy Tv's online and i always get cheaper pricing in store than online, for whatever Tv's i have bought. So never ventured into that space. Also most of the tv's i have bought are 42" or above, don't turst online shipping with such big sets. Also plenty of horror stories of used and faulty sets, no warranty of online tv's extra. So all depends how much risk you are willing to take.
That's my 2 cents.