logitech wireless trackball mouse on sale
$60 mouse for $22.
note: this is a basic mouse
not sure how many programmable buttons.
https://www.amazon.c...re_onesignal-20
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there's a more advanced "new" model
Logitech MX ERGO Advanced Wireless Trackball
price: $92
note: not sure how many programmable buttons available.
https://www.amazon.c...=dp_ob_title_ce