听力原文：W: I enjoy going through second-hand bookstores, don't you? It's interesting to see what people used to enjoy reading. Did you see this old book of children's stories? M: Some of these books aren't so old though. See? This Mystery was published only six years ago: It cost 75 cents. You can't beat that. W: Hey, look at this! M: What! Are you getting interested in 19th century poetry all of a sudden? W: No. Look here. Someone gave this book as a present and wrote a note on the inside of the front cover. It's dated 1893. Maybe it's worth something. M: Everything on that shelf is worth 50 cents. W: But if this is the signature of someone who is well known, it might bring a lot more. I hear Shakespeare's signature is worth about a million dollars. M: Oh? I can hardly read what that one says. Who wrote it? W: The name looks like 'Harold Dobson.' Maybe 'Dobbins'? Wasn't he a politician or something? I'm going to buy this book and see if I can find a name like that in the library. M: Good luck. Your poetry book may make you rich, but I'll bet my 75-cent Mystery is a good buy. (23)