Hi SPB, likewise I have a room full of books and a loft full of folders, thankfully mostly reasonably catalogued and sorted. I know which bits are scarce and which are unique and the local material will go into our local folk archive and any scarce stuff like my broadside collection and sheet music will go to EFDSS. Very few of the books are particularly rare and the majority will probably go to auction or charity. Whenever I have a cull I sell off anything interesting and the rest goes to charity or mates. What I am getting at is if you have any rare print or manuscript or if you have done any personal research or taken on someone else's archive this needs to be separated off and offered to either an institution or another archive. Far too much important material gets binned. I have possession of material that belonged to Nigel Hudleston, the folk song collector, and some of Malcolm's folk material and writings. What I did with some of Malcolm's books etc is I passed them on to younger researchers which is one good way to preserve them.