I suggest you buy from some good reputed exchange or from localbitcoin.It is risky to buy from anyone without using escrow or unless you know him or personally meet with him.
Yeah, he is right, buy from some reputated website like coinbase, localbitcoin etc.
What mode of payment you using?
Just an update on coibase:
I'd like to see how coinbase plans get around the current
security Issues, network Issues and coin loss with users.
You won't appreciate that they will respond after 6 days with an automated response.
Well, I've ran towards Paxful and other trusted sites.