I know you’re concerned about getting paperback books that have been used, but I want to pass this on to you if you aren’t already aware of it. Several years ago I joined paperbackswap.com, and get books periodically that I have in my wish list on the site. You post books to trade, and earn points from the people who request books from you. For every book you ship, you get a point, and when you order a book from someone else, you lose a point. You pay the postage for the books you send out, and the person you request a book from pays for the postage when they ship it to you. They have different levels of membership. I have the standard membership which costs $20 a year. When I ship books to people, I use the site, and print the label from there. The cost is all figured out, so all I have to do is wrap the book up, put the label on, and drop it off at the post office. They do have minor service charges for adding money to your postage account, and for printing each label, but they require that the books you swap be in good condition, and have a list of condition requirements for the books you post.
I like the idea of this site.
We are drowning in books, not just paperbacks.
This could be a godsend, unless of course, mr. mm orders more.