"Bookstore" What does the woman imply about the used books she sells?

Narrator: Listen to part of a conversation in the bookstore.
Student: Excuse me. I’m looking for someone who can help me with the textbook reservation
   program.
Manager: Oh, well, I can do that. What do you need? Student:Okay. Um, my friend told me that I could get used books if I order, I mean, preorder
   them now.
Manager: That’s right. Do you want to do that?
Student: I think so, but I’m not sure how it works.
Manager: Actually, it’s fairly straightforward. We have a short form for you to fiil out. Do you know  Q35
   what you’re going to take next semester?
Student: Yeah, I do.
Manager: And you have the course names and the schedule numbers for all your classes?
Student: Unhuh.
Manager: Okay, then, just put that information down on the form and, uh, make a checkmark in
   the box if you want recommended books as well as required books. And you said you
   were interested in used books, right?
Student: Right.
Manager: So mark the box for used books, sign the form and bring it back to me.
Student: Do I have to pay now? Or, do you want a deposit?
Manager: No, you can pay when you pick up the books.
Student: And when can I do that?
Manager: The week before classes begin.
Student: That’s good, but, um, what if 1 change my schedule? I mean, I don’t plan to but...
Manager: ... it happens. Don’t worry. If you change classes, you Can just bring the books back  Q36
   any time two weeks from the first day of class to get a full refund Of course, you’ll need
   the original cash register receipt and a photo ID and, if it’s a new book, you can’t have
   any marks in it. But you said you wanted used books, so it won’t matter.
Student: Yeah, that’s the main reason why I want to do this—because I’ll have a better chance
   to get used books.
Manager: If there are used books available and you marked the form, that’s what we’ll pull for you.
Student: Okay, thanks a lot. I’ll just fill this out and bring it back to you later today. I don’t have all
   the numbers with me, the section numbers for the classes.
Manager: Fine. We need those numbers because when different professors are teaching the
   same class, they don’t always order the same books.
Student: Right. So, will you be here this afternoon?
Manager: I probably will, but if I’m not, just give the form to the person in this office. Don’t give it  Q37
   to one of the student employees, though. They’re usually very good about getting the
   forms back to the office, but sometimes it gets realy busy and...you know how it is.
Student: Sure. Well, I’ll bring it back to the office myself.
Manager: That’s probably a good idea. And, oh, uh, one more thing. I should tell you that the used  Q38
   books tend to go first, so, if you want to be sure that you get used books...
Student: You know what? I’m going to go right back to the dorm to get thos~ numbers now, while  Q39
   you’re still here
Manager: Okay. That’s good.