If nobody wanted it in the first 10 years it was available, chances are it's only going to get one circulation if they buy it for you. That's not a great use of the libraries purchase budget or shelf space budget.
If they had a copy that wore out and it was circulated many times, they would have reordered it when they discarded it.
If they had a copy that wore out and it was circulated many times, they would have reordered it when they discarded it.