90+% of the breeders out there are very good reputable people.
When looking for animals
1. Decide what morph you are looking for
2. Browse the classifieds and websites to find an animal you like
3. Do a BOI search and/or inquiry on there and here to find out about the breeder who has the animal you like.
If you get good feed back contact the breeder about the said animal.
I don't really like when people ask for a list of good breeders because there really are so many of them. And to me it's not fair to some of the smaller breeders who are just as reputable and have just as amazing animals as the "big" names that always end up getting listed. I have nothing against the big guys, but the smaller breeders deserve just as much consideration when you're looking for a new animal.