Hi all, I'm about to buy a 2012 MBA, the laptop is claimed as new, and is supposed to be sealed not in the box but in the nylon it comes in the box. My question is, how can I identify if it's a 2012 model? Of course he won't let me open and start it, because it won't be "new" again in case I don't want it... I'm in uruguay and this thing is expensive... Just want to be shure whitout starting it up... Thanks.