For a limited time, eBay sells secondipity offers a $150 discount on Sony's headphones. Both black and silver versions of the headphones are now available for purchase for just $200. These are manufacturer refurbished headphones that are backed by a 90-day warranty. They should function like new, but they might show minimal signs of wear.
Keep in mind that if you decide to buy them while they're on sale, you will not receive the headphones in their original packaging. Also, you'll find manuals and other documentation on Sony's support site in case you need them.