ThinkGeek offers the Beacon Audio Orion Headphones w/ Mic in Black/Blue or Red/White for $14.99. Coupon code "FIFTHOFF" cuts the price to $11.99. With $6.74 for shipping, that's the lowest total price we could find by $21. Features include a 32 ohm impedance, 40mm dynamic driver, 3.5mm audio jack, and 20Hz to 20KHz frequency response. Deal ends April 13.
There's a less expensive way, and then there's the way that works for you. The two may not be the same.