Harman Audio via eBay offers its refurbished Harman Kardon Omni 20 WiFi Bluetooth Speaker in Black or White for $79.99 with free shipping. That's tied with our mention from three weeks ago and $150 under the lowest price we could find for a new one. It features a 53Hz to 20kHz frequency response, 802.11n wireless, and Bluetooth.

Note: This item carries the original factory warranty.