Costco offers its members the Microsoft Wireless Mobile Mouse 3000v2 in Black, model no. 2EF-00002, for $9.97 with free shipping. (Non-members pay 50 cents more.) That's $4 under our October mention and the lowest total price we could find by $6. This 3-button mouse features a tiny snap-in USB receiver that plugs into your laptop.

Of note, Amazon charges the same for Prime members, but it won't be in stock until June 9.