I used to pick up copies of the BB at Goodwill for a $ buck or two. I'd keep them in my car and give one to a newcomer.
Had a tendency to buy 'clean' [used] ones, but enjoyed looking at the hand-written notes in the others - felt kinda like I was reading someone's diary
some of the thoughts/notes were very deep.
Hey, they were donated books in a public store.
It's not like I was prying...LOL.