They range from 500 for a used motor to like 2000 for a brand new crate motor. What you could do is visit www.3lduratec.com they can hook you up with a 3 liter motor which can make a lot more power then a 2.5 liter SVT can.
If you are just doing to do a direct replacement CSVT engine, then you are wasting your money. You can get more power/torque for the same, if not less money with swapping in the 3.0L. Go to contour.org for all the answers....