Groupon offers two pairs of Altec Lansing In-Ear Headphones with In-Line Microphone, model no. MZX2051S, for $12.99 plus $2.99 for shipping. At $7.99 per pair, that's $67 off list and the lowest total price we could find. (We saw one pair for free after a rebate last month.) These noise-reducing earbuds feature 100Hz to 5kHz frequency response, a sliding cable adjuster, 11mm drivers, and 16-ohm impedance. Deal ends August 12.