Direct Tronics via Sears offers the Altec Lansing Desktop Speaker System, model no. BXR1220, for $19.99 with free shipping. That's the lowest total price we could find by $30. It's powered by USB and features two 2" full-range drivers, 3.5mm input jack, and 180Hz to 20kHz frequency response range.

Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.