sony mdr-v6 studio monitor headphones ($35)

Condition: like new (used for 3 months)

• A headset system designed for audio professionals
• 40 mm drivers deliver accurate sound throughout the frequency range
• Circum-aural design keeps ears comfortable
• Reduces noise from the outside world
• Copper-Clad Aluminum Wire (CCAW) Voice Coil enhances movement of PET diaphragm

http://www.sonystyle.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10551&storeId=10151&langId=-1&productId=8198552921665089914#features

($40)