Amazon offers the Sennheiser GSP 600 Professional Gaming Headset for $189.63 with free shipping. That's the lowest price we could find by $60. These closed-back headphones feature a 10Hz to 30kHz frequency response, noise-cancelling microphone, lift-arm microphone boom, and memory foam earpads.

Note: although it's temporarily out of stock, it can still be ordered at this price for delivery when available.

Update: The price has dropped to $185.86.