Massdrop offers the Superlux HD668B Semi-Open Headphones for $32.99 plus $5.37 for shipping. That's tied with our June mention and the lowest total price we could find by $6. They feature 56-ohm impedance, a frequency response range of 10Hz to 30kHz, and 1-meter and 3-meter detachable cables. They come with a travel bag and 1/8" to 1/4" adapter. Deal ends August 6.

Note: The expected shipping date is August 20.