The Fish store in Seattle has one of the better freshwater fish collections but I am not sure if he would pay you for them. Blue Sierra in Issaquah has bought both salt and freshwater fish from me so I would definately try them, talk to Jonas there he is manager/owner. Kings Discus in Seattle is another possibility, he is known for his exotic freshwater fish collection but I am not sure if he deals in Cichlids. I am sure there are others but these are the ones that come to mind in the Seattle area, good luck and let me now who you end up dealing with.