Walmart offers the Dell WM210 USB Wireless Optical Notebook Mouse in White, model no. K095T, Red, model no. K096T, or Blue, model no. K097T, for $6 with $2.97 for shipping. (Free Site-to-Store is also available.) Even with shipping, that's tied with our December mention and it's the lowest total price we could find by $13. Sales tax is added where applicable. This 3-button mouse features a USB receiver, scroll wheel, and 1,000 dpi. It operates on two AA batteries (included).