I love screameleons and I got my first cham from Vincent. Awesome person and breeder. But personally, if you really want to see a good selection of the various locales, then you have to go abroad where they have some locales that are not accepted here, like Nosy Radama vs. Ankaramy.
Here are two links to abroad websites that really show the difference between the locales:
they are all from different parts of the island and vary in pattern and color..one thing i know is the nosey faly are white backgronded and usually have red or bright burgandy splotches..you can google it and find out a lil more..i had looked them up for a friend like a month ago, and did tabs on them so i could do like a slide show of the different patterns, colors, and looks..