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Still using this old Logitech Trackman Marble FX. I never found a more comfortable new trackball to replace it with. : r/Trackballs
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Logitech Trackman Marble Trackball Mouse a?? Wired USB Ergonomic Mouse for Computers, with 4 Programmable Buttons, Dark Gray - Walmart.com
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Logitech Trackman Marble Mouse, Four-Button, Programmable, Dark Gray (Non-Retail Packaging) - Walmart.com
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