Harman Kardon offers its Harman Kardon NI In-Ear Headphones, model no. HARKAR-NI, for $73. Coupon code "NIHK18" cuts them to $18.99. With free shipping, that's tied with yesterday's expired mention as the lowest total price we've seen. (It's also a current low by $54.) They feature 9mm drivers, a 3-button remote, and 3.6-foot cord. Deal ends September 21.