Best Buy offers the Dynex Wireless Optical Mouse in Purple (pictured), model no. DX-NPWLMSE-PR, or Blue, model no. DX-NPWLMSE-BL, for $7.99 with free shipping. That's $7 off and the lowest total price we could find. Sales tax is added where applicable. Features include 1,250 dpi resolution, two buttons, and more. One AAA battery is included.