These are a D-sub 9-pin PC-98 mouse and a PS/2 AT-compatible mouse. I'm selling them because I failed to repair them. The PC-98 mouse is the one I failed to repair. I peeled off the circuit board pattern while replacing the sensor. The PS/2 mouse isn't a failed repair, but it doesn't move horizontally. Both are dirty. Neither of them is usable. Please purchase only if you understand this.