@roger,
My x's family lived in Missoula. Never been there myself.
On used books and bookmarks, I'm sort of sorry I never started saving them. Poems, prayers, and much else. In general I cringe (or worse, get enraged) when people mark up a book. Every so often though, the marks are interesting, ticks by someone pretty observant.
I've collected - by the fact that I like a lot of what soho publishes - about forty of the soho crime books. One is marked up, which I suppose makes it totally valueless - but the marker was a smartie.