The more you pay, the more it's worth.
What's the value in something that people are giving away? Perhaps it's not worth anything, you can't sell it because it has no value.
Granted a lot of stuff is guild - fancy paint on a crappy table or big words from a barbarian's mouth, but some of it is worth paying for because its solid gold through and through. The difference between Harvard and the local Community College is that one tends to have better students and teachers than the other. Which is not to say that the CC does not have any, they just don't have it consistently. Nor is it to say that 'everyone who goes to Harvard/Yale/West Point is going to be a lot better than the CC counterpart. We know that's not true. Its possible to get a good, or worthless education in both. It's just that in the end Harvard has a)more better students and you're going to learn more from them than from the teacher, and b) more students going full time, so you have the opportunity to teach each other.
And hey, if you think that knowledge and understanding are expensive, look at how much ignorance costs.