4surpluscity via eBay offers the refurbished Logitech M185 Wireless Optical Mouse in Swift Gray, model no. 910-002225, for $7.99 with free shipping. That's tied with our mention from last month as the lowest total price we could find for a refurbished unit by $2, outside of the deal below. (It's also $11 under the best price we could find for a new one.) This 2.4GHz portable mouse features a nano-receiver and requires a AA battery.

A close price: Nothing But Software has it for $8.49 with free shipping.