Actually I shoudl add buy a graded one by someone reputable
BSG, BCCG, PSA, GAI, PRO
All these are good. I am sure there are others but these are the most popular and range in price based on who graded it.
Is there anything to the decimal in 27.2 relating to authenticity?
I've seen sellers use that decimal point as "proof" of authenticy and I have seen cards without that decimal point, but I assume many some reprinters are smart enough to make sure they add it.
I just bought a jordan off ebay which I believe to be real I will post pictures here when I get it for help determining if its real