Secondipity via eBay offers the refurbished Sony MDR-1000X Premium Noise-Canceling Bluetooth Over-Ear Headphones in Black or Beige for $169.99 with free shipping. That's $10 under our October refurb mention and the lowest price we've seen. (It's also $130 below the best deal we could find for a new unit today.) They feature 40mm high-sensitivity drivers, frequency response of 4Hz to 40kHz, 20 hours of playback, microphone, Bluetooth, and easy-touch controls.

Note: A 90-day Sony warranty applies.