I charge $5,000 per day for on-site training, to train a group of up to 12 people. People have told me I'm undercharging. People have told me I'm more expensive. People buy my services. (We train on Linux system administration related topics, and on Git for version control.) I have contributed (an appendix) to an O'Reilly book and have spoken at numerous conferences.

Speaking of which, I have a partner that does AWS on-site training -- contact me if you'd like a quote. :)