Walmart offers the Dell WM210 USB Wireless Optical Notebook Mouse, model no. K095T, in White for $8.48. Shipping adds 97 cents, or choose free Site-to-Store. Even with shipping, that's the lowest total price we could find for a comparable Dell mouse by $12. 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).