It is fairly easy to spot a bird flipper. They usually have involved stories about the bird to tell you. Usually want a high price. Will not be able to answer detailed questions or give you any references. May not want you to see where the bird has been housed. Bird may or may not be in bad shape. I do not think I would buy a bird from them because it will just encourage more flipping. I would call animal control to see if they could investigate. What would you do?