I also don't understand the mentality that releasing a new product and not letting you sell back an old one is 'bad' customer service. Car companies release a new car every year....do you expect them to eat the depreciation and buy back the car you racked 10,000 miles on after they release a new one a month later? That's what you're effectively asking Apple to do. Do you really think that's fair?
When I buy a car that is close to the end of it's cycle, such as a 2009 that I'm buying in December I always get a discount off what that car cost back in January of the year, don't you? It's ok with me if you want to spend full retail at all times but most of us are more savvy than that.
There's a stark difference between a retailer discounting products to move inventory at the end of its life cycle and a product manufacturer actually buying back used products so their customers can extend the 'newest version' kool-aid sipping
All products are discounted heavily at the end of their product cycle to make room for new inventory...including Apple products (i.e., the Macbook Airs were on sale at Best Buy a couple of weeks before the refresh). And they do this not as a courtesy to their customers...they do it to sell off as much inventory as they can before a refresh comes and they have to discount old inventory down to levels where they're potentially taking a loss on the sale. Its very much a business decision.
And if buying at the end of the life cycle to save money is really your priority, don't whine all over a forum because you're upset that Apple refreshed their products a few weeks after you purchase your Macbook Air. And don't have the audacity to expect them to buy back your outdated gear to absolve your buyers remorse. If having the latest greatest version really is that important to you, pony up the price premium charged to be an early adopter....if not, don't get upset when your device is outdated sooner than you'd like. Simple as that.
The ironic thing is, if Apple did buy back your 2010 MBA, you'd end up buying a new one at retail price anyway...and assuming that Apple would buy back your 2010 MBA for less than you paid for it (as they likely would if they did buy it back), you'd actually end up spending MORE than retail.