It has been almost 3 years since I purchased from a breeder, so I do not have much experience. I hope someone with some more experience can post here and let us know. I plan to purchase a new chameleon within the next few months.
I have received a chameleon or two via overnight mail, each time with success. It is a very delicate process, which is a good reason to find a respected breeder; someone who cares about the animals, not just the money. The chameleons were shipped in a small special 'live animal' packaging. They had a small twig for the little baby cham, and a small heat pad contained in a compartment below the chameleon. I forget what it was called, but a special kind of shipping was used. I picked the packages up directly from the airport.