The recurring exception to this HN maxim is when the work is artistic. Then it's not possible to price it low enough to avoid the scorned cries of, "overpriced. my kid could do this."
People here seriously overvalue their work. How much effort put towards peoples' countless "Show HN" projects would have been better spent contributing to similar, more-developed open-source projects?
If this is the bazaar, maybe cathedrals ain't so bad...
Art is subjective, of course, and an artist is free to ask whatever they want for their work. I am unimpressed and probably not the target audience (as other comments allude).
This is where you are wrong, many of the 'more-developed open-source projects' are what once used to be on Show HN and other forums. Instead of working on their personal projects, if people only contributed to more-developed open-source projects, then that is all we will be left with, only those softwares, no new innovation.