Sennheiser PC350 $35
has mic and speaker jacks
https://sfbay.craigslist.org/pen/ele/d/mountain-view-sennheiser-pc350-headset/6979281529.html

Plantronics BackBeat PRO Wireless Noise Cancelling - $50
bluetooth headset
can make / receive phone calls too
very comfortable and quiet
https://sfbay.craigslist.org/pen/ele/d/mountain-view-plantronics-backbeat-pro/6979281123.html

Can meet at the Caltrain Station in Mountain View on weekdays or on campus on weekends