I read today that the average GPA at Harvard is A-. So I don’t know if it would cost very much to buy an A. And it probably wouldn’t be worth much to the student, since they can get an A- with minimal effort. I have heard that about Harvard for decades, that it’s hard to get into, but once you do, the classes are all graded very easy.
That seems quite plausible.
The real challenge is to get into the elite schools.
Once you have the diploma, I doubt any employer even thinks about asking about GPA.
In this modern era, those degrees truly are a golden ticket to prosperity.