It really does depend on the practitioner and the results. I'm a multi-disciplinary therapist and I know other practitioners who charge half of what I charge but get little success. Conversely, I know practitioners who charge double my fee and also get little success and many in between who get good results.
A couple of months back I completed a 9 week programme with a client who came to me for, smoking, drug and alcohol abuse, insomnia, work related stress, family issues and some weight issues. He has now quit cigarettes, drugs and alcohol, sleeps soundly through the night, has lost 9lb, is now self employed has doubled his income and has worked through his family stuff to a point where it no longer depresses him.
So, by his own reckoning he revealed that with his yearly savings of a minimum £10,000 from quitting smoking and abusing alcohol and drugs, plus his 100% increase in salary (approximately £45,000) that puts £50,000 minimum every year in his pocket! Not bad for an investment of £1,080!
Like I said it really does depend on the practitioner. And as you might guess, my clients don't outsmart me otherwise I wouldn't manage to achieve such results! I've also been around the block a time or two myself..!