VMInnovations discounts a selection of refurbished Sennheiser headphones, via the coupon codes listed below. With free shipping, each is at least $35 below the lowest total price we could find for new units elsewhere. The headphones:

• Refurbished Sennheiser HD 218I On-Ear Closed Back Headphones for $14.99 via "VMFS21"
• refurbished Sennheiser HD 360 Professional DJ Headphones (pictured) for $38.99 via "VMFS36"
• refurbished Sennheiser HD 280 Pro DJ Stereo Headphones for $57.99 via "VMFS28"
• refurbished Sennheiser HD 380 Pro Studio Monitoring Headphones for $74.99 via "VMFS38"
• refurbished Sennheiser PXC450 Noise Cancelling Travel Headphones for $184.99