Second-hand books are books handled by families or libraries, not books from unknown sources. At all times and in all countries, there are many people who like to collect books, as well as scholars, and so on. They like to visit old bookstores and search for their favorite books, which is different from going to new bookstores. Moreover, there will be some well-known old bookstores at all times and in all countries.
If there is a useless title page, you can try to tear it off or stick it on with other stickers, which may be self-defeating, but you can't return it. If you stamp the right side of the book, try to see if the sandpaper can be worn off. It may not be useful to do this as a last resort.
Don't break books and make a fool of yourself.
You should consider it clearly according to the actual situation.
Even if the owner agrees to return the book, the postage will not be refunded. Generally speaking, if you agree to return the book, you will bear the postage of two books, and the book will be sent back to the owner for collection, and the book fee will be refunded to you.
If you don't agree to return it, you won't return it. This is a waste of time. You are not an expert in delivering things, and you don't often send them. The postage will be more expensive than that of the shopkeeper. Lane is bad, the owner can't receive the book, money books are gone.