I've owned several Macbooks, and the way they are packaged makes it unlikely a store could pass of an open boxed item as brand new. However, I recently purchased a brand new MBA from a large national retailer. When I got the laptop, everything seemed well. The box was shrink wrapped, the laptop itself was sealed in plastic with the sticker intact, there was the protective sheet on the monitor when I opened up the laptop, and upon start up it asked me to register and all that jazz. However the very strange thing was the laptop had two visible smudges on each side of the trackpad, looked very much like palm marks from someone putting their hand there. It cleaned off easily though. Could this just be from the assembly/ QC process from the factory? I'd think it would be very unlikely i got a used/refurbished unit just from all the above factors I listed, but thought i'd check.