Harman Audio offers its refurbished Harman Kardon Aura Bluetooth Speaker in Black, model no. HKAURAAPBLKAM, for $139.99 with free shipping. That's tied with our mention from three weeks ago and $12 less than the lowest total price we could find for a new unit now. This omni-directional system features a 50Hz to 20kHz frequency response, six 1.5" high- and mid-range drivers, and a 4.5" subwoofer. A 1-year Harman warranty applies. Deal ends March 26.