A transformation course is typically a main offer in a sales funnel.
So if you already have a funnel with a lead magnet and an introductory course (or a low-cost product), a course that costs anywhere from $99-$499 (mid-range) will be a great fit as the main offer in your funnel!
A transformation course is where you deep dive into a specific topic in a step-by-step way, and help your students implement and get results. You are there with them throughout the process keeping them engaged, answering questions and helping them make progress.
An introductory course is paid course that's designed convert your free users into paying customers! It should deliver a quick win for your students and help build trust. You can charge anywhere from $29 to $99 for this course.