Secondipity via eBay offers the refurbished Sony Wireless Noise Canceling Headphones in Black or Grey for $54.99 with free shipping. That's the lowest price we could find for a refurb by $12. Buy Now Tips A 90-day warranty is included, although it's not clear who backs it Features 40mm dynamic drivers 20Hz to 20kHz frequency response selectable active noise cancellation microphone & on-board controls Bluetooth 4.1 up to 35 hours of music per charge Model: WH-CH700N