It is shipped from UK, so that's why it's $14. Considering that, isn't really that bad. About 3 days to deliver, too. I checked the tracking of an order of mine, and it was in London one day, and on my doorstep the next (in IL, USA).
As for the cable, the PCB is the same, the only difference is a cable. The IPAC will auto detect the interface and adjust accordingly. The cable is a passive conversion cable (like the little adapter plugs that come with some USB mice). I suggest getting the USB cable, as you can always get a PS/2 to PS/2 cable easily, but the PS/2 to USB cable is hard to find.
Rick