✔ 最佳答案
The answer is no.
When you buy in quantities at a book fair, the publisher will give you a bigger discount, compared the one you usually get from a retail bookstore.
However, at the same time, you will end up spending more money (Remember - it is not an event with free admission even with purchase).
Also, the publisher may provide you some more incentives (like book signing, gifts, etc.), which makes the fair more attractive.