Barely used Sennheiser Momentum 4 Bluetooth headphones. I tried pretty much all the audiophile-level wireless headphones under $700 before choosing these. The Momentum 4 not only had the best battery life and excellent comfort, they sounded the best by a good measure. Connectivity is great and noise cancellation is terrific. I used them only once for an airplane trip and they almost completely silenced the engine roar. Selling only because I don't use BT headphones enough to justify having them. They're in excellent condition with no issues and include all the original accessories, case and box.

Retail: $379
Selling for $199, plus $15 shipping CONUS only.