Walmart offers the PyleHome 300-watt Bluetooth Soundbar for $110.25 $109.99 with free shipping. (Deal-Buys via eBay has it for about the same.) That's the lowest price we could find by $5. Features include USB, SD slot, and remote control.

Update: The price has increased at Walmart; however, Deal-Buys via eBay still offers it for the same price.