A commodity is a product that is the same no matter where you get it. A bag of flour is a commodity, because it is the same whether you get it from your local store, through a fancy cooking store, or order it over the web. Those who sell commodities compete on price because the consumer knows the product is the same.
Bushcraft and wilderness survival school courses are not a commodity. From school to school there are vastly different ideas as to what should be taught, how to teach it, and what level of skill and experience one needs to teach it in the first place. Thus the product, the experience of taking a course and what you learn there, differs greatly from school to school. With this in mind, the cost of a program is of little value as a point of comparison.
If you’re thinking about taking a course, contact the school or instructor and find out what you stand to learn and experience.