Newegg offers the Razer Kraken Pro World of Tanks Wired Headphones, model no. RZ04-00870700-R3M1, for $69.99 with free shipping. That's the lowest total price we could find by $20. These closed-back heaphones feature a retractable microphone, 40mm neodymium-magnet drivers, and a frequency response range of 20Hz to 20kHz.