I'm buying a Macbook Air 2009 on craigslist for $500. It's a really good price and I've done business with the seller before so I know it's safe and legit. I was wondering what problems came with the 2009 Macbook Air, as I'm not sure what rev this is. Any tips on some things to do before buying? Here are the specs: Processor speed: - 2.13 GHz Processor Type: - Intel, Core 2 Duo (Penryn) Installed RAM: - 2 GB (2x1GB) onboard Max. Amount: - 2.0 GB Hard Drive: - 128 GB, Solid-State Display Size: - 13.3-inch Graphics Card: - NVIDIA GeForce 9400M Card Memory: - 256 MB Max. Resolution: - 1280 x 800 Any information is welcomed, thank you!