Need for 1TB m.2 nvme ssd

So I've recently been in a need for storage space and would like to purchase an ssd. I already have a 512 gb ssd installed on my laptop which is not sufficient so I searched google and major shipping platforms like Amazon and Flipkart.

I am well aware of the situation with the ram and ssd prices in the market but where should I get a real one major platform have some but either they are like ₹16k+ or ₹6k which is just unrealistic price.

Since it is rare to find authentic ssd even at current price (inflated which I assume should be around ₹13k)

I am also down for a second hand nvme if I find a good deal just need help in where to find them.

TLDR: Need authentic M.2 nvme ssd new/ used at reasonable prices, need help in where to find them.

My location - Bhubaneswar/ Odisha