Back when I read a lot I also tended to move a lot and books are heavy. If someone showed interest in a set of books I would typically give them to them. Books are heavy and a pain to move. I have always been more interested in reading books than owning them.
I only have a few books now and they are mostly none fiction. I like ebooks because I don't need to wear my reading glasses, which I loath and I don't have to worry about where to store. I still enjoy book stores though.