Meritline offers the second-generation MEElectronics HT-21 Portable Travel Headphones for $18.99. Coupon code "MLCE17PN" cuts it to $13.99. With free shipping, that's $1 under our August mention and the lowest total price we've seen. (It's a current price low by $1.) These foldable, padded, and adjustable over-the-ear headphones feature 40mm drivers, 10Hz to 20kHz frequency response, tangle-resistant cable, and 3.5mm plug.