Ends 9/25 at 10PM PT. Sellout.woot! has the Bowers & Wilkins PX7 Wireless Bluetooth Adaptive Noise Cancelling Over-Ear Headphones (Space Grey) on sale for $230 with free shipping. 

30 hour battery life (with ANC on), Bluetooth 5.0 (up to 2 devices at once), custom 43mm drivers, sensors for auto start/stop.