Shop4Tech has the Microsoft Wireless Notebook Laser Mouse 7000 for $32 - 15% off with coupon code JB15
[Exp 7/5] = $27
with free shipping. Operates on a 2.4 GHz signal, with a range of up to 30 feet.
If you also need a keyboard too, take a look at the following combo:Refurbished Microsoft Wireless Laser Desktop 6000 for $33 w/ JB15