Thumb Score: +19

Number 2 store via Amazon [amazon.com] has Memzuoix Large Ergonomic Vertical Wireless Mouse (Black) on sale for $9.99. Shipping is free w/ Prime or on orders $35+.

Note: Forward/back buttons are not compatible with macOS.

Product Description from Store:[LIST][*]2.4G Wireless USB (USB 2.0 Receiver)[*]Sensor: Optical[*]DPI: 800 / 1200 / 1600 (adjustable)[*]Buttons: 6[*]Hand Orientation: Right