Trans veileds are definitely a thing - we have some here at the breeding center
"Premium" veileds are often from breeders who have specific lines for higher amounts of yellow, blue, or specific patterns or temperaments. They are more likely to be nicer or more mellow, and you have the bonus of being able to see the parents.
You can get regular veileds from places like us, which will still grow up to be big, beautiful chameleons, it's just more of a luck of the draw as far as color or temperament.
Panthers are, in general, more colorful, and are likely to be nicer or more accepting of handling than most veileds. They are not quite as easy to produce babies, and this is reflected in their price. If you're willing to shop around and check out lines, breeders, and locales, you can find a panther in nearly every color of the rainbow.
-Jen
