Birth classes (Hypnobirth, Bradley, etc) - Cost?

abbyful

We're going to take the childbirth class at our hospital for free. But I'm also thinking about taking a Hypnobirth or Bradley method class. What is the ballpark cost for these types of classes? I want to know what to expect when I call for a price quote: if it's a normal rate or if that particular instructor is trying to rip people off. Thanks!