This is a Sennheiser HD280 Pro Headphone. $99 on Amazon. Selling it for $49.

• Perfect if you do a lot of concentrated work like programming, design, and writing
• Dynamic, closed-ear headphones with up to 32 dB attenuation of outside sound
• Lightweight and comfortable, ergonomic design, Cord Length - 3.3 - 9.8 feet Coiled
• Extended frequency response and warm, natural sound reproduction
• Around-the-ear design with padded earcups

Let me know if you are interested! Trying to sell it by Thu, 1/18.