As far as pricing goes, vendors receive a discount or commission from the publisher in exchange for handling its titles. The discount varies according to publisher and discipline. For example, since law publishers tend to pay no commission, a law library will have a higher service charge than a public library. Once the vendor selection is made, the library must choose whether to create new order records for their titles or to continue using existing order records. In either case, the library must provide their order record numbers along with their list of titles.
Most vendors load a large list of the library's titles as a pro forma or dummy invoice.
They need the title, the order record number, the ISSN, and the last payment information. The new vendor will attempt to clean up start dates that have gotten out of whack. They must clearly understand how your invoicing works. III has a 500-line maximum for invoices. When the library receives the pro forma, the staff should carefully check it.