Patron: "My wife and I are cleaning out our house and downsizing and I have a lot of books to donate."
Patron: "I have one requirement: the books must be added to the collection."
Me: "Well, unfortunately I can't guarantee that items donated to the library will be added to the collection. We will certainly consider any that are appropriate and will sell the others in the Friends' book sale."
Patron: "Well, these are rare books and some of them are quite valuable. I have had dealers interested in buying them, but I wanted them to benefit the library."
Me: "Well, we'll be happy to take them but again, we can't guarantee what will happen to them after you donate them."
Patron: "Okay, that's fine. I'll donate them. But you should check online to make sure you ask a fair price for them."
Patron hands me a box full of Readers Digest and Time-Life subscription series books from the 1980s.
Me: "Thanks!" [Interior monologue: Yeah, real rare and valuable.]