Honestly, I never believed the kidnapper theory but there are people who do, and I must say that by now whomever would have the child for whatever reason, they would certainly have come looking for whatever they wanted by now. Also, I seriously doubt anybody would ever extend the amount of money that Casey would have to be in debt to warrant taking a child, considering the risks of committing such a crime. Nobody that is owed a couple hundred dollars is going to take on a kidnapping scenerio. What a hassle! and not ask for your money? It would be easier for people like that to just get rid of Casey. Has anybody ever heard of an organized crime group taking a child for debt, um no. And as far as Casey selling her, she obviously didn't put much effort into anything, and stealing from her family was pie. Who would put her in contact with people that want to buy a 3 year old? Not like you can post an ad, and Casey is not very ingenious IMO. She would not take time away from her new party life to shop for baby buyers.
But on another note.......if somebody ever did have this child, for whatever reason, it would be very easy for them to give her back and make up a story anybody would believe as to why they had her. After witnessing the Anthony's antics for the last month, I think we (or at least I) would believe they are capable of anything.