There is no limit to how expensive you can make a chess set (Fill it with diamonds, pay the Queen to piss on it, use wood smoked on burned dollar bills).
But why does a championship chess set need to be produced expensively?
That was the question I was hoping for, when I watched this video a long time ago, and now I dislike all the videos from this series when the appear on my recommendation feed on YT.
You can always make an expensive version of something. It is interesting to know _why_ something has to be expensive.