For its current newsletter subscribers only, newegg.com offers the Kensington Wireless Netbook Mouse in Gray/White, model no. K72349US, for $24.99. Coupon code "EMCYWZN25" drops it to $14.99. With free shipping, that's the lowest total price we could find by $5. It features a USB receiver, two buttons, scroll wheel, and more.
The Rug Market Counterpoint - 72349E is also available at these stores