Sony Store offers the factory-refurbished Sony Wireless Noise-Reduction Headphones in Black, model no. MDR-RF970RK, for $79.98. In-cart, it drops to $39.96. With free shipping, that’s $22 under the lowest total price we could find for a new unit. Sales tax is added where applicable. These headphones feature 40mm drivers and a 150-foot range. A 90-day Sony warranty applies.