Secondipity via eBay offers the factory-refurbished Sony Premium Noise-Canceling Bluetooth Headphones in Black or Beige, model no. MDR-1000X, for $299.99 with free shipping. That's $48 under the lowest total price we could find for these new. They feature 40mm high-sensitivity drivers, frequency response up to 40kHz, 20 hours of playback, microphone, Bluetooth, and easy-touch controls. A 90-day Sony warranty applies.