Dell Small Business offers its Dell UC350 Pro On-Ear Stereo Headset in Black for $79.99. Coupon code "35OFFBIZ" cuts that to $51.99. With free shipping, that's tied with our mention from ten days ago and the lowest price we could find by $2. It's certified for Microsoft Skype for Business and features a 150Hz to 7kHz frequency response and noise-cancelling boom microphone. Deal ends June 1.