For its Prime members, Amazon offers the Koss PortaPro Headphones
, model no. 155491, for $24.99
with free shipping
. (Non-Prime members can qualify for free shipping by spending $35 or more; otherwise, shipping adds $5.74.) That's tied with our mention from two weeks ago and the lowest total price we could find by $13. They feature a frequency response of 15–25,000 Hz, multipivoting ear plates, and adjustable headband.
Orders placed today are guaranteed to arrive by Christmas; Prime members can order by December 22 for guaranteed arrival.