Best Buy offers the Pioneer Portable WiFi Speaker with AirPlay for iPhone, iPod, and iPad, model no. XW-SMA4-K, for $79.99 with free shipping. That's $100 under our June mention and the lowest total price we've seen. (It's a current price low by $119.) It connects wirelessly to your device and features a built-in 4" subwoofer, 3-way speaker, HTC Connect, USB, and remote control.
Amazon offers the Pioneer Andrew Jones-Designed 2.1-Channel Soundbar System, model no. SP-SB23W, for $296.99 with free shipping. That's $28 under our October mention and the lowest total price we could find, outside of the mention below, by $24. It features a 6.5" 2.4GHz 50-watt wireless subwoofer, six 28-watt speakers, four 3" mid-woofers, two 1" dome tweeters, Bluetooth, and frequency response of 45Hz to 20kHz.
A close price: Newegg has it for $299.99 with free shipping.