More or less, because of greedy people. Buster Sword replicas were readily available for around $80 until the Final Fantasy parent company, Square Enix, and their lawyers went after every company making replicas. Since then, the only replicas you can find are by independent artists on Etsy, where they only produce one at a time and do not have a massive stock the way the $80 Chinese replicas did. Another thing about the Chinese replicas is the swords were very cheaply made, looked junky, and boasted fragile stainless steel for the blade. So what Square Enix did was make crappy Buster Sword replicas disappear. This article will further elaborate.