To be fair, with most of those, you're paying for a piece of art to some extent. I don't think anyone buying $500 cables thinks the cables themselves are worth that, they're buying them because they expect some tiny increase in sound quality which measurably and provably doesn't exist. Someone buying a $10k sweater isn't buying it for the engineering in the material, but for the perceived artistic value. Of course, there's also a grift involved here, where fashion brands can pass things off as having great artistic value just because they're associated with the brand. But at least the perceived value is subjective and not coming from something that can be measured not to exist.