It's what is called "Price Gouging". They charge that much, because they can. The demand is high. People buying that magazine probably do not have clue about buying seeds online, or don't have access to the internet. Basically, they're preying off the ignorant.

It's what Marc Emery has been doing for over 10 years. Even after all the "In your face, sky is blue" kind of proof, people still stick up for this con.