The Price of Knowledge: To Pay or Not to Pay for Online Courses?

The majority of people who are selling you a course aren't doing it out of your best interest. They are selling you their course to make money, not to further your career. Don't get me wrong; there might be some good information in that same course. But 90% of any course online can be obtained for free on the internet. YouTube, OpenCourseWare, Khan Academy, Coursera, Gutenberg, Google Books, to name a few. So why would you buy one?