There is more than one. Don't feel bad. If you didn't already purchase the little guy below is a list of fantastic breeders that do it right because they love the animal. If I was looking for a panther I would buy from one of these guys.
iPardalis
Frams Chams
Kamerflage Kreations
You want to shop for QUALITY of chameleon and its care vs price.
Lastly, if you are new at this I would probably not do bioactive to start with. I would recommend Bill Strand's strategy for enclosure set up so you have a clean bottom.
(Read this husbandry course here) This allows you to collect poop easily for fecal samples to test for parasites as well as monitor the poop, which tells if your cham is hydrated or not.