IIRC, the VCT seleniod costs between $300-400 + labor.
To have the belt/tensioner and idler pulleys replaced it was $300 for labor. $600 total.
I asked them to do the pulleys since the car has 95,000 on it. I knew it would cost a bit more but I figured it would be easier to do them now rather than rip everything apart again later.
Good luck and let us know how you make out.