One of the frustrations about things like that is that you pretty much know someone would want them but I'm pretty much not going to go to the effort of connecting with that someone.
We call the local public library and ask if they know anyone who would be interested in x-x media we are getting rid of.
They always panic slightly thinking we're trying to give it to them (most libraries are inundated with out of date materials people donate), and are happy to give us names and numbers of churches and elderly centers who might take them.