My Logitech MX518 mouse. I use it every day for work - 40 hours a week for over 10 years, and still going strong... though it could use a little cleaning. : r/BuyItForLife
Logitech G MX518 Gaming Mouse - High Performance
Logitech MX518 Classic Gaming Mouse Upgraded version MX500/MX510/MX51 – ProgamersHome