Different locales can be higher priced than others because they may be more difficult to get. Some of them are not imported very often and there isn't a big captive collection to work with. Ambilobes are well established but the mitsios or ankaramys aren't found very often. Color has a lot to do with it too. The very brightly or unusual colored pure chams can be more expensive because people want the jewels of the species. When you go get a dog do you chose the puppy that just looks alright and skip the one that looks like it could be in a show ring? No you probably want the pretty one! So that breeder can charge a little extra for that one since you and probably others really want it. Same idea.
The morphs/hybrids are generally lower priced because no one wants them for their breeding lines since they aren't genetically pure.