Are any of these bettas rare?

Sadly no, if told me the price range you got them for, then I could tell you. By the way you phrased the question, it sounds like you don't know much. You probably got them at your local fish store for 13 bucks max. Rare and high quality bettas go for around $50 each and are breeded and obtainned through breeders. Any example of this bettas would be a href="http://www.youtube.com/watch?v=Iv6JZ6LObug" rel="nofollow"http://www.youtube.com/watch?v=Iv6JZ6LOb…/a