Sears offers the Turtle Beach Ear Force X12 Amplified Stereo Gaming Headset, model no. TBS-2255, for $17.94 plus $6.50 for shipping. (Free in-store pickup is also available.) That's tied with our mention from two weeks ago and the lowest total price we could find by $11. It features 50mm speakers, adjustable bass, microphone, and both Xbox 360 and USB connectivity.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.