Grab Wireless via eBay offers the refurbished Logitech UE Megaboom Wireless Bluetooth Speaker in Charcoal Black, model no. 984-000436, for $169.99 with free shipping. That's $10 under our November mention of a refurb and the lowest total price we've seen. (It's also $74 under the cost of a new one today.) It features Bluetooth streaming to two devices at once, NFC pairing, a frequency response of 65Hz to 20kHz, two 2" drivers, rechargeable battery, microUSB charging cable, and wireless range of up to 100 feet.

A 30-day warranty applies, although it's unclear who backs it.