537748-001 - HP 2-Buttons Scroll Wheel PS/2 Optical Mouse 537748-001 - HP 2-Buttons Scroll Wheel PS/2 Optical Mouse $70.97
417966-001 - HP 2-Button USB Optical Mouse with Scrolling wheel 417966-001 - HP 2-Button USB Optical Mouse with Scrolling wheel $71.57 $60.65