If you are one of the few people who has or is able to do something, that does not mean you’re entitled to be a complete jerk and sell it overpriced and/or charge people money to begin with for information or to help someone out or something that was free to begin with.
Your time is honestly not that precious–especially when you weren’t going out of the way to do something. You CHOSE to do it for YOURSELF to be a complete butt to others. Congratulations.