After a while on hanging out with the wonderful guys at #libreboot IRC, I
believe I found a way to make sure this machine is the one it says without
having the seller to run commands. I haven't tested yet, but it seems one
could input the serial number and see what components was built in with. Hope
fully it will tell me the LCD panel too :)
http://support.lenovo.com/us/en/partslookup
I already asked the seller for the serial number. Fingers cross :D