Best Buy offers the Dynex Wireless Optical Mouse in Blue, model no. DX-NPWLMSE-BL, or Purple, model no. DX-NPWLMSE-PR, for $5 with free shipping. That's $3 under our August mention and the lowest total price we've seen for this mouse. Sales tax is added where applicable. Features include 1,250 dpi resolution, two buttons, and more. One AA battery is included.