Comparing prices for anything (courses, software, services, etc) to a marketplace (Udemy, app stores, Upwork, etc) isn't a good comparison. A single source will

Comparing prices for anything (courses, software, services, etc) to a marketplace (Udemy, app stores, Upwork, etc) isn't a good comparison. A single source will never be able to compete with the efficiencies of scale, and often the quality in marketplaces is a race to the bottom.