An exerpt from the book, "The Bearded Dragon" by Steve Grenard states:
"According to Roy Hoser, the author of two books detailing the illegal export of Australian animals, most bearded dragons were smuggled out of the country between 1974 and 1990."
The book further explains that alot of confiscated stock was giving to breeders to care for legally instead of being destroyed. Most of the captive bred bearded dragons outside of Australia were from those breeders. Some may also be descendants of smuggled animals but all are captive bred since Australia was able to elminate for the most part, illegal smuggling. This was also helped out but people refusing to buy wild caught and thus, smuggled, bearded dragons.