The tightwads in this thread need to relax.
First off, there is nothing shameful about other users asking to pass the headphones on to them. They're being enterprising and considering that some people here jumped in because of the low price, compare them to whatever they have, and then say something like, "You know what? I don't need these AND my Ultrasones/Beyerdynamics." Then, why not pay it forward to some member that has been wanting this item? Being angry at something like this is akin to being angry at the For Sale section, since technically, by buying used headphones, you are depriving the headphone manufacturers of a sale, and to me the headphone manufacturers are much higher in importance to me than some online reseller.
Second, if a company decides that they want to enter the internet sales game, and on top of that want to distribute their products through Amazon, then it's THEIR job to make sure something goes right, not mine. Just like the stock market, the internet is not a place to just make easy money. You have to do research, hire the correct help, and cover your bases. There are cases all the time about car dealers deciding to cash in on the ebay craze, and then when they fatfinger some auction, they decide that they aren't making enough money on the sale and want out. Sorry, but it's all spelled out before you sign up what the risks and rules are. In the same way, if a reseller sells something online, it is their job to provide the correct price. You can't expect me to know the "correct" street price of every item I buy. If Best Buy is selling a $2,000 Macbook for $600, and I'm not familiar with Macbook prices, why is that my fault? Even further, if I do know the price, it is their fault for messing up. They aren't absolved because "they didn't mean to." My doctor friends don't get to say "Whoops, I gave the patient 20cc of medicine instead of 2cc of medicine." Pilots don't go, "Oh, I should be flying at 40,000 feet instead of 4,000 because there are mountains that low." Do the job right, or go do something else. I am not your mother, and I am not going to coddle you and wipe your bottom for you. Last, these companies, again like car companies, never lose out. You guys understand that, right? If they sell something for a profit, then they get a profit. If they sell something for a loss, then it's a tax writeoff. Same goes for every product, btw this is why you can get cars cheap, especially last year's models on the lots. Worst case scenario, they claim it and the books even out in the end.
BTW, I did not get in on the deal, but if anyone in Texas is tired of their M50's, then I'll take them off your hands for you! Just kidding, I have too many headphones already. My next step, once I have a bigger place, will be either the Ultrasone Edition whatever-is-out-at-the-time, those new Sony flagship ones, or some other similar headphone. I'm a sucker for well-designed lower impedance phones (sub 70 Ohm).