I paid $100 for mine. I bought mine before I bought my VE motor. If I knew then what I know now, I would have bought a dual window switch similar to the Granatelli unit. You can switch the solenoids independently OR at the same time with that unit. Plus it's new and less than $100.
The VAFC will work fine though. $100-125 is about par for the course. I have seen them from $90-$150.