How much does a high end audio system cost?

I'm curious, how much does a high-end audio system typically cost? I've heard rumors of prices reaching into the tens of thousands of dollars, but I'm not sure if that's accurate. What factors go into determining the cost of such a system, and are there any specific brands or models that stand out as particularly expensive or high-quality? Additionally, what kind of features or capabilities can one expect to find in a high-end audio system that sets it apart from more affordable options?