I would check libraries. They have to get rid of books all the time as they get old or run out of room for things that are more wanted currently. When book from a popular series comes out or if it becomes popular they get a bunch of copies. Like sometimes as many as a dozen (back in the day at least when physical books were the main thing) but then once most of their patrons have read it and its not as big in demand they drop down to half a dozen. Later still when new crazes have surpassed it maybe 3 and when everyones forgotten about it 1 or worse 0. Of course they will always retain the ones in best condition.
I would check libraries. They have to get rid of books all the time as they get old or run out of room for things that are more wanted currently. When book from a popular series comes out or if it becomes popular they get a bunch of copies. Like sometimes as many as a dozen (back in the day at least when physical books were the main thing) but then once most of their patrons have read it and its not as big in demand they drop down to half a dozen. Later still when new crazes have surpassed it maybe 3 and when everyones forgotten about it 1 or worse 0. Of course they will always retain the ones in best condition.