fish stores probably will not take them, if they do, they won't give you anything for them, fish that size are simply too hard to sell, and will end up taking up tank space at the store forever, i would list them on kijiji, you would be lucky if you were able to give them away....they get a lot bigger then that too....not too many people would have an adequate tank size for a tinfoil barb, they would be best kept in a pond