I think you should find corals from your local reef aquarium society. They will really give you good or fair price. Its also great when you see the coral with your own eyes. Its hard to judge a coral by pics alone.
Research soft corals, mushrooms, zoas, and LPS
. It will really help you learn more about what you like and dont like. Researching has really narrowed down my stocking for my own tank.
Edit: read what other people have to say about a certain coral you are interested by googling. Fast and easy answers. You will end up going through multiple threads.. And hours..