Consider that for that price, the teacher offers his time to help students. If the price was lower, it's likely he'd have more students; perhaps a lot more. Th

Consider that for that price, the teacher offers his time to help students. If the price was lower, it's likely he'd have more students; perhaps a lot more. The more students he has to deal with, the less time the teacher will have to help each one of them. On one side you've got private tutoring, where a teacher can work 100% of his time with one student, and at the other end are free MOOCs with tens of thousands of students, where the students are peer-graded and are unlikely to ever interact directly with the teacher. While MOOCs are great for what they cost, it's pretty obviously not the same quality of education as private tutoring, or by directly interacting with a teacher. So for this class, the teacher decided the minimal level of interaction he thinks is necessary to make a high quality web security course, and decided the price so that he gets an amount of highly motivated students that he can manage with the time he has.