How do you deal with non-stop talkers?

Tweet

I recently met (over the phone) a woman who can talk non-stop for hours, apparently. A mutual friend gave her my number since she was looking for someone to give her advice on selling secondhand merchandise, which is one of my occupations. After being on the phone about 15 seconds, she broke into her life's story, which I tried to listen to compassionately, but enough is enough. She does seem like a nice person, just has a lot to talk about! I was glad to help her out, but I have never met anyone who talks so much! She even talks more than my cousin who I try to avoid. At least, with this woman I could get a word in edgewise, and she listened to what I had to say. But if I had to deal with this person everyday she might drive me around the bend. I'm not a big conversationalist myself, I'd rather be writing, but getting to know her could be an asset, since we both love secondhand and I really could use some help, but I'd hate to offend her by telling her to shut up already! So, could you put up with a non-stop talker if it could benefit you in other ways? She's supposed to call me again tomorrow. Help!