Well that was an upleasent sight. Maybe this old fool is just an old fool. Better to be safe then sorry. "Look I don't like playing the fool. You offered 800 for the books, then 1000. I have no time for silly pawnshop haggling, so tell me how much they are worth. I know how a shop works, and you won't pay for their full worth, but I'm not going to sell you them for 1000 if you are going to turn around and sell them for some ridiculous price like 100,000." Still holding on into the man's head to find the correct number of the worth of the books. Other wise he could just be an asshole and lie.