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 G602 Lag-free wireless gaming mouse - 11 programmable buttons - Computer Parts & IT Accessories - 110600392
Logitech G602 Gaming Mouse Review: Fast and Furious
Logitech's G602 Wireless Gaming Mouse features 11 programmable buttons at $30 (Save 20%) - 9to5Toys