Guide Buying Refurbished Laptop form e-furbished. tl;dr are they scam?

Ace8

Beginner
I am thinking to buy thinkpad t480 from e-furbished site. This is my first time buying from them and I am not sure if they are genuine or fraud. If anyone has any experience form them please share. I aked them for there GST no. and they told me to search for "Pavamaana Integrated Services Pvt Ltd". They are accepting payment through Razor pay only and said with EMI you won't get any discounts and also no COD available. Its a good deal should I buy it from them?
 
What about battery life? How many hours are they saying?
I didn't asked them that, but they are certified refurbished sellers(Atleast that's what they say), so I am thinking its going to be good! though it doesn't matter to me, as I am going to replace it. All I can care about if it reaches to me! and I will not get scammed.