As one of its daily deals, Best Buy via eBay offers the Logitech M557 Bluetooth Mouse, model no. 910-003971, for $21.99. Choose in-store pickup to avoid the $2.99 shipping fee. That's tied with our May mention as the lowest price we've seen; it's also the best deal now by $7. This wireless mouse features customizable buttons, vertical and horizontal scroll wheel, optical sensor, and ambidextrous design. Two AA batteries are included. Deal ends today.