I've recently transitioned from my 15" MacBook Pro (early 2011) to a 13" MacBook Air (2011). I found one on Craigslist (1.7ghz i5, 4GB, 128GB) still under warranty for $800. I also purchased for $500 from eBay a 480GB OWC 6G SSD. This is nice given that my MBP previously had a 500GB hard drive. I'm only now starting to read about how much better the 2012 MBA's are over 2011. My consolation is that for $1300, I have an MBA w/ a (almost) 500GB SSD, whereas that would cost way more for the 2012 MBA. Nonetheless, would it be worth to try to sell this (I think I could at least break even), and get a 2012 MBA w/ a 256GB drive and maybe 8GB ram? Is the performance in the 2012 MBA that much better than a 2011 MBA w/ a 6G SSD?