Panasonic offers its Panasonic Bluetooth Wireless Speaker System, model no. SC-NE1, for $99.99. With free shipping, that's tied with our October mention and the lowest total price we could find by $55. It features a music streaming app that allows you to choose how you access, stream and play music from your smartphone or tablet, 2-channel sound system, 40 watts of power, Bluetooth connectivity, and a frequency response to 20Hz to 20 kHz.
Panasonic offers its Panasonic 2,300-watt Extra Large Audio System, model no. SC-MAX650, for $699.99 with free shipping. That's the lowest total price we could find by $281. It features 4-way floor standing speakers (including 15" "super woofers"), illuminated woofers and main unit, USB playback, and preset equalizer.
Note: This isn't a bookshelf system — the speakers weigh 68 lbs. each.