Sonic Electronix offers the Sennheiser Momentum 2.0 On-Ear Bluetooth Headphones in Black, model no. M2 OEBT, for a $256.49 with free shipping. (You must enter your name to see this offer. Amazon charges the same in-cart.) That's the lowest total price we could find by $143. They feature a folding headband, cushioned ear cups, NoiseGard active noise cancellation, 28-ohm impedance, 16Hz to 22kHz frequency response, Bluetooth 4.0, 22 hours of playback, NFC connectivity, USB cable, 1.4mm cable, adapter, and carrying case.