should i get open box/second hand macbook?

hey, so just a heads up, ive been looking to buy a new macbook and have come across a lot of videos n reels regarding some shops in delhi which sell them at extremely low rate, now by extreme i dont mean 25k-30k, instead more like 60k-80k but for a pro model thats significantly cheap.
is there anyone whos bought their mac from these marketplaces? if so could you suggest a shop where it's trustworthy or the quality is better, cause my current MacBook is from 2019 and although this was bought brand new, I haven't been using it due to lag issues, and the repair charges r way too high for me to invest in a mac that is 7 years old.