Logitech V450 Nano Cordless Laser Mouse for $29.99.  Choose in-store pickup during checkout to save on shipping.  This mouse's nano receiver is small enough to stay with the laptop without needing to be unplugged.  The cordless mouse itself has up to 12 months of battery life.  As a comparison, Best Buy currently has it on sale for $44.

This deal has expired. Congratulations to those who were able to get in on it!