Where do you find the objective reference value of all things including marketing courses? Do you have a big book with the true value of everything in it? Peop

Where do you find the objective reference value of all things including marketing courses? Do you have a big book with the true value of everything in it? People have different amounts of money and value things differently. $30k to me would represent a significant investment and probably not worth a single plane flight, but a billionaire might spend that to charter a jet for one flight and consider it money well spent. It’s relative.