Pay no attention to the fact that Apple has sold an entry-level Mac Mini for $499 for the last 9 years.
They have sold the entry-level Mac Mini for $499 for 1 week. Before that, it was $599.
It used to be $499, then went up to $599 for a few years, now back to $499. Which is all beside the original point: there is not a high barrier to entry for the Mac. And it has a lot of additional value to a lot of people: simple for the beginner, and an entire open-source UNIX for the advanced user, combined with high-quality parts and great service, a big ecosystem of software and services, and almost no viruses or threats to worry about, and a lot of folks (me included) think life is too short to deal with Windows at home.