Pack of 100 Logitech PSE Optical Wheel Mice in Black for $18.45 plus $39.38 shipping, which comes to a total of $57.83 shipped. Note it’s for PS/2. Here is a screenshot for your reference. Note that the high shipping charge is due to the number of mice you get! There is also a promotion code LFFRRRHM for an additonal 5% off when you purchase 200 mice.