BuyDig via eBay offers the Sony Extra Bass Wireless Bluetooth Over-the-Ear Headphones in Black or Red, model no. MDRXB950BT, bundled with a 2,600mAh Portable Power Bank for $88 with free shipping. That's $13 under the lowest total price we could find both bought separately elsewhere. (For further comparison, we saw just the headphones for the same price last week.) They feature 40mm dome drivers, a bass-boosting DSP circuit, rechargeable Li-ion battery with 20-hour talk/playback time, Bluetooth 3.0 with a 30-foot range, 3Hz to 28kHz wired frequency response, 20Hz to 20kHz Bluetooth frequency response, built-in omnidirectional microphone, and auxiliary 4-foot 3.5mm audio cable.
Don't want the power bank? Amazon, B&H Photo Video, and Best Buy charge the same or a little more.