If its in good or better condition , look for comparables on Biblio.com
Without knowing the condition of the book it is impossible to guess. Give them a visit and find out.
Not a great forum for your question, this isn't a place maintained by HPB. As above, your best bet is to bring the books in. However, without knowing what you have, i'd say a safe range is likely$0.50-$24
Call them, or go in
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