Presumably the library already has the ISBN of the books it is getting rid of.
They could pull out the ones worth >$1 after checking on Amazon and then package and ship them - but thats probably not cost effective for a library employee and getting little old ladies to spend the day packaging and shipping isn't what they volunteered for.
They could get in some minimum wage temp labor to do this once a year - but that's not really the libraries core business. It would be like having police patrol cars pick up cans by the side of the freeway for the 5c recycling (now theres a business model)
They could pull out the ones worth >$1 after checking on Amazon and then package and ship them - but thats probably not cost effective for a library employee and getting little old ladies to spend the day packaging and shipping isn't what they volunteered for.
They could get in some minimum wage temp labor to do this once a year - but that's not really the libraries core business. It would be like having police patrol cars pick up cans by the side of the freeway for the 5c recycling (now theres a business model)