B&H Photo Video offers the Panasonic Noise-Canceling Travel Earphones in Black/Silver, model no. RP-HC56-K, for $24.99 with free shipping. That's the lowest total price we could find by $43, although we saw them for $2 less in December. They feature 22dB of active noise cancellation, three sizes of tips, a volume slider, and up to 40 hours of operation.

Update: Shipping is now $3.50.