Black and White doll.

This doll belonged to my Grandmother. I acquired it throgh her estate. It was hers as a little girl. This doll was made back when blacks and whites were not equal, but blacks were slaves. My guess would be that this doll was made by a person for a special reason or whatever. It is very different and unusual. I have never seen one like it before, and everyone I show it to, are amazed. The doll is one piece, just half white, half black. My grandmother did point out that not many were made. There are NO markings on the dolls.There is one dress, but two different designes when you flip the doll. All moveable parts still work. The doll is old, and not in the best shape, but is very unusual. I hade it examined by a local antique dealer, and he was willng to give me a couple thousand for it. I want to know what you might value it at, and the age.