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
Amazon.com: Logitech G MX518 Gaming Mouse Hero Sensor 16, 000 Dpi Arm Processor 8 Programmable Buttons (European Packaging) - Black : Video Games
Price roundup: Five budget gaming mice compared | MyGaming