Has appeared in comments, but deserves its own thread: the MX510 Logitech mouse. Mine is approaching a decade old; still functions perfectly. : r/BuyItForLife
Logitech M185 Compact Wireless Mouse - Designed for Laptops
Shameless Showoff: 61 gram Vintage Logitech mouse with a PMW3360 PCB swap along with Kailh 8.0 switches, a ALPS encoder, and my first para cord. : r/MouseReview