Newegg has the Rosewill RM-2400L 6 Buttons 1 x Wheel USB Wired Laser 2400 dpi Mouse for $10 - $5 off with coupon code EMCNAJG68 [Exp 9/19] = $5 with free shipping. Features sensor sensitivity switching (2400, 1600, 800dpi), and four programmable buttons.
Horrible customer reviews on this
What is that wire coming out of the top of the mouse?
Seems like a pretty good deal though somehow I never find generics to have the same fit and finish as Logitech, MS or Razor, and the reviews are ~.