Buy.com offers the Logitech M705 Wireless Laser Mouse, model no. 910-001935, for $29.99 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $8, although it was $3 less in March (since expired). This right-hand wireless mouse purports to have a 3-year battery life and features a nano-receiver, scroll wheel, and more.