Fry's Electronics offers the Creative A220 2.1-Channel Multimedia Speaker System, model no. 51MF0400AA002, for $19.99. Pad your order over $23 (these Blu-ray movies cost $3.99) to bag free shipping; otherwise it adds $10.79. (In-store pickup is also available.) That's the lowest total price we could find by $8. It features 2-watts per channel into two channels and a 5-watt subwoofer. Deal ends December 12.
Note that this item is on backorder with an estimated shipping date of December 20.
Accessory Genie via eBay offers the Gogroove SonaVerse Color-Changing LED Desktop Speakers in Grey for $14.99 with free shipping. That's the lowest total price we could find by $5. These 6-watt speakers feature a frequency response of 250Hz to 20kHz, 3-foot USB cable length, and a 3.5mm audio output cable.