Massdrop offers the Massdrop x Noble X Universal In-Ear Monitor Headphones for $249.99 with free shipping. That's a savings of $250 off list price. They feature dual balanced-armature drivers, a 15Hz to 25kHz frequency response, 30-ohm impedance, detachable cable, and 3.5mm gold-plated audio jack; it include five pairs of eartips, a cleaning tool, and carrying case. Deal ends December 8.
Note: It has an estimated shipping date of March 17, 2017.