Newegg offers the Rosewill Passive Noise Isolating Earbuds in Red/Black, model no. E-360-BKR, for $7.99 with free shipping. That's the lowest total price we could find by $7. Features include an inline microphone with control button, 10mm drivers, frequency response of 10Hz to 22kHz, and 4-foot cord.
They're also available in Blue, model no. E-360-BLE, for $8.99 with free shipping. That's a price low by $6.