Massdrop offers the Final Audio Design Sonorous VI Headphones, model no. FI-PA6BD, for $499.99 plus $10.05 for shipping. That's the lowest total price we could find by $124. They feature a 50mm dynamic driver and single balanced armature in each cup, stainless steel housing, detachable cable, and two sets of ear pads. Deal ends August 15.

The expected shipping date is September 4. Of note, the second pair of earpads may arrive in a separate shipment.