Best Buy via eBay offers the open-box Harman Kardon One Portable Bluetooth Speaker in Black, model no. HKONEBLKUS, for $84.99 with free shipping. That's $15 under our mention of a new one from two weeks ago and the lowest total price we could find now by $105. It features a frequency response of 100Hz to 20kHz, speakerphone, and carrying case.
Note, this item is new but may not ship in the original packaging. A 1-year Harman Kardon warranty applies.