VMInnovations offers the Sennheiser adidas Sport In-Ear Headphones, model no. OCX 685i, for $79.95. Coupon code "MG6JKHN" cuts it to $39.96. With free shipping, that's the lowest total price we could find for this color by $20, although we saw them in white for $15 less in August. They feature a frequency response of 18Hz to 20kHz, in-line smart remote and microphone, and 3.9-foot cable.
This item won't arrive in time for Christmas using free shipping, but may arrive in time if you order today and select Express Shipping for $12.95.