What are some examples of saltwater fish that are cheap and can be found in pet stores aquarium shops /?

Water fish salt should be cheap as $ 5 and can be purchased at pet stores and aquarium shops. How much salt water fish?

any damsel http://www.liveaquaria.com/product/scateg.cfm?pCatId=28 any chromis http://www.liveaquaria.com/product/scateg.cfm?pCatId=1634 A

Hippo Tang – That Fish Place Saltwater Fish Species Profile