mhnajjar,
Which MBA did you buy on amazon and how long ago? can you send a link?
thanks,
NYU02
Both revBs are available on Amazon. If you buy it and it turns out to have the lines, they would exchange it without any issues. That is what happened to me.
nph got his from the first try <--- one lucky dude.
I am sure it won't go wrong, the worst case, they would give you a full refund. It is way safer than eBay, BestBuy and even the Apple Store where jerks would treat you like an addict to perfection!