I remember reading that bookstores don't actually pay in advance for their inventory, they pay only when a book is scanned and sold. So, it's unsurprising that

I remember reading that bookstores don't actually pay in advance for their inventory, they pay only when a book is scanned and sold. So, it's unsurprising that the discounts on many of the books won't get too large, as they are likely not even the property of the company.