Blinq via eBay offers the open-box TDK Life on Record Trek 360 Wireless Speaker in Black, model no. A360, for $43.89 with free shipping. That's $6 under our August mention of a new unit and the best deal we've seen for it in any condition. (It's also $176 under the lowest total price we could find for a non-open-box unit.) It features four speakers, a ported subwoofer, Bluetooth 2.1, 3.5mm auxiliary plug, USB, and rechargeable battery.