Absurd is a pretty inappropriate word to use. When reading the article it's easy to research some of the information used in it and see for yourself that it's true.
And seriously, even if you go to the NERD website, their prices are slightly higher than the Kingsnake norm, but not by much. I'm not sure what you're basing this post on, as just a few minutes of research can show how drastically certain morphs has dropped in price.
And this isn't about "You get what you pay for" either. I bought my pastel butter for around $200 more than average market price, because he was absolutely worth it. However, back in 2009 pastel butters were going for around $400 - $500 more than what I paid as the AVERAGE price.