Source code without any permission to use nor any exclusive right to prevent others from using maybe isn't worth much to any buyer, but this was black market. I

Source code without any permission to use nor any exclusive right to prevent others from using maybe isn't worth much to any buyer, but this was black market. Is access-only source code ever sold on the open market? How much does it fetch? Or given that software is heterogeneous, what is some code that would fetch a high access-only price if it were so available on the open market, and how much, order of magnitude?