Thumb Score: +25 Walmart.com has Logitech M570 Wireless Trackball Mouse on sale for $19.99. Select free in-store pickup to save on shipping, otherwise shipping is free on orders $35 or more. Thanks jbarnett Note, availability for in-store pickup may vary by location. Deal Editor's Notes & Price Research: The Logitech M570 Wireless Trackball has an average rating of 4.4 stars (out of possible 5 stars) based on 13,138 customer reviews.