A friend recently directed me to a newish book blog called Awful Library Books. It's a submission-based blog--for and by librarians--containing scans and summaries of book culled from library collections for being particularly dated, absurd or politically incorrect.
It's an entertaining read and I'm actually seeing a number of books I would snap up at an FOL sale for my shop (like this teen inspirational title by Twisted Sister frontman Dee Snider).
Reading this blog has hi-lighted for me the difference in outlook between a public librarian and a bookdealer. Librarians want titles with a broad, current appeal and a long shelf-life while bookdealers seek titles for which a specific and rarified audience will pay through the nose.
Ironically though--if this blog becomes widely enough read--librarians will probably start getting requests for these titles again.