Cleaned up a few posts. Always be sure to research livestock that you would add to your reef. Starfish are cool, but some (like chocolate chip stars) will eat coral and are not a good fit to add to a reef tank.
My suggestion would be to research some of the specific species you'd like to add. Some that will get along with coral and can be cared for in your tank. As has been noted already, starfish usually have specific needs that may be difficult to meet in a lot of our tanks.
Regarding the removed post, anyone intentionally leading another hobbyist to do something that will kill their livestock is in violation of our terms of service for ethical treatment of reef inhabitants.