Are you sure that is a nano? Where is the headphone jack? And is it a touchwheel, or regular buttons? Looks exactly like the chinese ripoffs of nanos. And I think if it is one, it would be wrong to sell it to somebody as a nano.
I could be wrong because it is hard to tell from the pic if the circular area is raised for buttons or sunk for touchpad. Bad angle. Oh well.
Sorry in advance if it is genuine.