Logitech Ergo M575 Review: This Is a Very Good Trackball
Amazon.com: Logitech M570 Wireless Trackball Mouse – Ergonomic Design with Sculpted Right-Hand Shape, Compatible with Apple Mac / Microsoft, USB Unifying Receiver, Dark Gray (Discontinued by Manufacturer) : Electronics
Farewell M570, hello Sanwa Bluetooth. (Review in comments) : r/Trackballs