ISBN scanner for books.?

Q: Ok my sister in law goes to Goodwill once in a while when they have boxes and boxes of stuff goodwill puts out for people to buy. Well she told me she saw people with some sort of scanners on their cell phones and they would scan the books and then sell them on ebay. These things tells them if the book sells for alot and if its even worth buying. Does anyone know where to get a scanner like this. We go to yard sales and see alot of books. Would like to purchase one of these. Thanks in advance. No this is not to copy books. It is to buy the ones that sell for a profit. Thanks

A: Sounds like doing that would be a Copyright violation and against the law. Could easily be something to go to jail for as it's the same as copying Music, Movies or anything else someone else has created. I Hope this Helps!

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