I'm contemplating the sale of my 11.6" MacBook Air. I bought it shortly after they became available last October. My 15" MBP remains my workhorse. It's in excellent overall condition. I can't find a mark of significance on the case, screen, or keyboard. Here are the details:
1.4 GHz Intel Core 2 Duo
2 GB 1067 MHz DDR3
128 GB Apple SSD
I have all of the original packaging and Mac OS X on USB drive. I would do a fresh installation of OS X before shipping. I also have a nice WaterField Designs slipper case for it that would be included. I believe this model currently sells for $1200. I think mine is worth $900. Let me know if you're interested. Pictures are available on request.