If you want to sell professional books, I advise you to save your energy, because no one in the countryside likes to read such obscure things.

If it is some novels, comics and other entertainment books, or some useful students' books, I suggest you take them to sell near the school, because there are more students and parents.

If it's a cookbook or a family medicine book, it's ok if it's available in the market.

Finally, no matter where it is sold, be careful to be banned by law enforcement officers!