I haven't seen the other thread but am just jumping in here to refresh this one and widen it a bit.
What about in the UK? Has anyone any thoughts about the best way of disposing of books here? I have what I think is an interesting collection of song and tune books, but it's a bit of a specialised interest. If someone else ends up having to dispose of them one day, what would be the best way of going about it? I know they'd sell on eBay but that requires a lot of time and effort.
Would organisations like The Wren Trust or Folkworks have any use for them? Has anyone got a better idea?