bought the 2010 11" Air on Craigs for $800 5 months ago and sold it yesterday for $850. that is the only way you can "win" is to buy used and sell at the right time./QUOTE]
That holds true for all tech resales. Like cars, if you buy new at full price, even 30% depreciation in a year is considered good. But if you buy the used one at 30% off the new 9 months later (eg, buy 2010 MBA 13 now), you will lose little in a year, as those suckers are still very fast and, other than the unlit keyboard, they look and feel and respond like the 2011 SB version.
Not to repeat, but Apple created huge depreciation problems for buyers of last year's MBA and MBP 13s buy using 2 gen old C2D cpus in 2010 and jumping to very current SB cpus less than a year later. I don't know of any windows notebook that so dramatically and quickly obsoleted a product in less than months. Still, buy the 2010 MBP or MBA at today's prices, and you still get an excellent computer, more than fast enough for 90% of users. Next year, when you want to move up (again, to a 2011 vintage, not 2012), the depreciation hit should be more like 15-20%.