Stem_Tech via eBay offers the refurbished Polk Audio FR1 31" Bluetooth Soundbar and Subwoofer System for $119.99 with free shipping. That's $279 less than you'd pay for a new system today. The set features a soundbar with two 2.5" full-range drivers, 120-watt 6.5" powered wireless subwoofer, 40Hz to 20kHz frequency response, Bluetooth, 3.5mm auxiliary input, and remote control.

Note: A 6-month warranty applies, but it's unclear who covers it.