Jumping in awfully late in the discussion, I'll speak for why I generally hold tight to my purse strings. I come from an academic background, and when I've taken classes, I know what I'm getting. The university or organization behind the course is accredited. The teacher is vetted. The subject matter is presented in a transparent manner. (I've never had a professor tell me that if I want to really master the course, I need to meet him at the back of the classroom with my credit card.)
I'm sure there are good real estate teachers (coaches, gurus) out there. However, it's the Wild West in terms of differentiating the good from the bad, and the signal to noise ratio is very low.
There's also difficulty in figuring out who's actually good at teaching. I've been an instructor before, and the skill set is not the same as it is to practice the subject itself. Being great at RE doesn't necessarily make you a good instructor (and vice-versa.)
What would be nice would be the same sorts of stats that schools put out - the equivalent of independently determined graduation rates, test scores, etc., not just cherry-picked student "success stories." If we insist that RE is all about the numbers, shouldn't we expect the same from RE education?