Adorama offers the Samson Professional SR950 Studio Reference Closed-Back Headphones, model no. SASR950, for $29.99 with free shipping. That's tied with last December's mention as the lowest total price we've seen. (It's the best deal now by $18.) They feature 50mm neodymium drivers and a frequency response of 10Hz to 30kHz.
Also available is the Samson SR850 Professional Studio Reference Headphones, model no. SASR850C, for $24.99 with free shipping. That's tied with our Black Friday mention and the lowest total price we could find by $16. Features include a 10Hz to 30kHz frequency response, self-adjusting headband, gold-plated adapters, and an open-ear design.