As one of its daily deals, Groupon offers the refurbished Samsung 2.1-Channel Speaker System, model no. HW-FM45B, for $79.99 with free shipping. That's $68 under the lowest total price we could find for a new unit. It features a soundbar with two 30-watt speakers, a 60-watt subwoofer, Bluetooth, Dolby Digital and DTS, and wall-mount bracket. Deal ends September 30.
Note: A 30-day warranty applies, but it's unclear who backs it.