Walmart offers the Sol Republic Shadow Bluetooth Headphones in Grey/Rose Gold, model no. 1140-04, or Black/Grey, model no. 1140-01, for $79.99 with free shipping. (Best Buy via eBay has them in Black or Grey for the same price.) That's the lowest total price we could find by $6. They feature Bluetooth, three-button control, microphone, and USB to micro USB charging cable.
Update: Specs corrected.