Since I sell a subscription service, I've mostly studied others doing the same, but I've bought a few courses from very successful creators. Adam Wathan, for example, sells a 4 hour course for $150 a 22 hour course for $250. He's later said in interviews that he regretted making it such a giant course.
If I were to sell a one-off course, it would probably be at least somewhat grounded by those values since it's what the market has already set.
And to be honest it hasn’t been that bad, my main course has made $160k over its various iterations the past 5 years. The bigger thing is that I’m realizing the how-to style tactics course that is so popular these days doesn’t deliver what I truly want to teach.
My business is newer and smaller, but I've still encountered a couple of really aggressive emails. I suspect that it would be more if I were selling a one-off course instead of a feed, too!
The part that makes me sad are complainers who buy a $200 course then ask for a refund because they blazed through it in an afternoon and feel like $200 should be at least 3 weeks of content.