Amazon offers Prime members the Logitech M187 Wireless Optical Mini Mouse in Black, model no. 910-002726, for $9.99 with free shipping. (Non-members can spend $35 or more to bag free shipping; otherwise, it adds $8.12.) That's tied with our July mention of a different color and the lowest total price we could find for any color now by $12. It features a nano-receiver, 2-button design, and a scroll wheel.