Kensington mouse trackball with scroll ring
http://www.kensington.com/us/hk/4493/k72337us/orbit-trackball-with-scroll-ring#.VhfOZBOqqkoIt's virtually brand new, used one but I like my Logitech one where the trackball is on the side instead.Brand new is $399, will sell for $150. I don't have the box or receipt anymore hence I am selling it for $150
Prefer to trade on island line station.
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