Cowin Official Store via eBay offers the Cowin E7 Pro Active Noise Cancelling Wireless Bluetooth Headphones in Black or Red for $71.99 $72.99. That falls to $56.99 $57.99 in-cart. With free shipping, that's the lowest price we could find by $20. They feature 10-ohms impedance and a 20Hz to 20kHz Deal ends August 30.