Even damaged, it has value to somebody looking to do a rebuild.
There are people out there who need a 3.0l engine and are willing to rebuild one to get it for cheap. Or already have a damaged engine and they could combine parts from the two to make one good one. Or somebody with a race car looking for a spare engine.
Trick is finding those people who need it.
You could also try posting some ads on the various BMW forums and BMWCCA website and Roundel. You could probably get a grand or so for it, is my best uneducated guess.