I saw a lot of bangla selling 2nd hand/refurbished ones in shockingly low price, superb condition. Some even still in warranty, checked the sets personally but I am just wondering how do they get such prices ?

I was quoted RM2.7k for a Alienware R15 2015
They are also selling a lot of higher ends model 3 or 4 thousand cheaper

Fishy price but the item itself is authentic and flawless, is there anything I need to be worried about before buying from them?

Stolen sets? Grey import?

stolen

If they are stolen sets, means their serial no. is probably blacklisted ?

Warranty by who ?

depends on previous owner have made a report to the Notebook company and police or not

For that set, it's Dell's international warranty, he even went to Dell website to confirm the warranty for me, other sets he provides 6 -months warranty, some have Malaysia warranty but he did not disclose a lot on other model that I am not interested to buy.

website wont show the set got police report or anything 1..

call in n ask

honestly there are a lot of 2nd hand laptop selling, they might bought from 2nd reseller and sell. 2nd hand reseller do give warranty to them, so they can provide the warranty to u too.. this is my thought only..