Brodart library supplies sells the software and scanners for books that you are looking for. If you stock 1000’s of books, it’s worth having.
We have had a retail book store since 1971, and see those people with scanners all over the place. the only problem as we see it is, the information they obtain on the scanner, is already in our heads. They are looking for that one good seller. But, ask them if they are living on the income from the scanner. I doubt if they are. It seems like they are looking for a get rich scheme. To make a good living off of books, you need 1000’s of titles, and more than one of each. Like the others have said on this topic, buy in bulk.