1782 Bill of sale, 6 pages...

This is a bill of sale for the purchase of a restaurant bar next door to my parent's home in France. I remember living in that house with the restaurant / bar next door. This bill of sale was for the purchase of that restaurant by an ancestor of mine. It dates back to 1782. It is held together by string in the center and it is intact, all six pages still bound together. The paper is a "greased" paper. It is showing it's age, however one can easily make out all the writing which is in French. I do not know if something like this has any value other then something of interest. Let me know if think otherwise.
Have a great day where ever you are.

I really do not know in what category this fits in.