This one I bought used a couple months back and used it for a handfull of pulls on the dyno and then swapped it out again.
It's used and in very good condition.
$125 shipped to lower 48 states.
I believe just ignition control as far as I know.
With the USB you'd need an ignition module to plug in but they do not make a module for the RC based PC-USB.
So if you want to adjust ignition, the IIIr is the way to go.