Harman Kardon via eBay offers its refurbished Harman Kardon Omni 20 WiFi Bluetooth Speaker in Black or White for $79.99 with free shipping. That's $20 under our March mention and the lowest price we've seen for it in any condition. (It's also $150 less than a new one today.) It features a 53Hz to 20kHz frequency response, 802.11n wireless, and Bluetooth. Note: This item carries the original factory warranty.