When we do inventory of books, about 7000 of them, it takes a team of 3 or 4 people scanning labels on the back of books, about 5 hours to scan them all. Add 3 or 4 more people in to watch the computer(s) for errors as scans come in. Then add an hour or two to pur things back to normal.

For a used bookstore with no pre made labels and books stacked and crammed I’d double the time. Then add some more for books that don’t have a barcode on them...

This is with laser barcode scanners and dedicated machines per device. Phone scanners are much slower.. either way, give me a crew of people, scanners, etc and we could scan about 10K books a day.