Dell Home, via its Member Purchase Program, offers the Roccat Nyth Gaming Mouse in Black for $99.99 with free shipping. (Amazon has it for the same.) That's the lowest price we could find by $7, outside of the mention below. The mouse features a 12,000-DPI laser sensor, 1,000Hz polling rate, 1ms response time, 50G acceleration, and 12 buttons. Deal ends June 22.
Note: Dell's MPP is available to select groups, including students, government employees, military (active and retired), credit union members, and health care workers.
A close price: Newegg has it for $103.93 with free shipping.