As we've gained staff this year, we're able to work on some projects that had been on the back burner in previous years, such as taking stock of our woefully neglected rare books room. As far as I can tell, there hasn't been a proper accounting of what's in there, and we now have eager part-time librarians and interns who want to learn about preservation, digitization, and the original cataloging that comes with those topics. I repeat: you have not properly preserved nor digitized an item until there is robust metadata to go with it. End rant.
One of our part-time librarians has a nice camera, and has been trained to catalog, so what's left is to train this staff member to preserve and digitize. Book mounts can be remarkably expensive for being a few pieces of foam, but we have a trick up our sleeve: Michael's. Yes, the craft store.
My first library job was in preservation for a small theological library in New York City, where I blew a bunch of money on Mylar, and my third was guillotining and digitizing books at a large Midwestern university (yes, I was there for Double Fold, in which two of my bosses are quoted out of context), so I have some background on this area of librarianship. If you are into preservation, Michael's should be your best friend.