Ask HN: What would you pay a small amount of money for?

What would you be willing to pay a small amount of money for (digital product, service or subscription) - say $1-$5, which you cannot already find online or you can find, but for some reason, you think it's not worth it. Bonus points if it could be considered of actual "value to society" in some way. Not another organization, productivity, finance, conference, social, chat etc. The market is flooded with such generic products. I'm thinking more on the lines of a tool which might help someone in their profession.