150 + 15 shipping.
Also, turns out not all ps/2 to USB adapters are created the same. I tried to hook my IBM keyboard up through the one that I had lying around, and it didn’t work at all. Well, the pc recognized it or a sec, but then it went away. Then it kept acting like the device was repeatedly being connected and disconnected. Tried it on the Powerbook and same result.
Oh well, I guess I’ll just get the Y-mouse when I really need it.