As one of its daily deals, Musician's Friend offers the AKG M 80 MkII Semi-Open Studio Headphones, model no. 6000H51090, for $29.99 with free shipping. (Click "Stupid Deal of the Day" banner to see this deal.) That's $150 off and tied with our mention from last fall as the lowest total price we could find. These headphones feature a self-adjusting headband, single-sided cable, and leatherette ear pads. Deal ends today.