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Customers will want to be buying from someone who knows what the product is and what it can do for them. If you don't catch their interest within the first ten seconds of your pitch, they probably won't continue. Say something like: "Hi! I'm selling ____ for my school/[name of organization] fundraiser. I was wondering if you were interested in purchasing _____ today." Tell your potential customer why you are selling your product. For instance, to raise money for your school.    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/27\/Sell-For-a-School-Fundraiser-Step-8.jpg\/v4-460px-Sell-For-a-School-Fundraiser-Step-8.jpg","bigUrl":"\/images\/thumb\/2\/27\/Sell-For-a-School-Fundraiser-Step-8.jpg\/aid30469-v4-728px-Sell-For-a-School-Fundraiser-Step-8.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"}   That's as much of a motivation for people to buy as the product itself, sometimes even more so. Remember to say what you are raising the money for and have as much (if not more) information on the cause as well as the product. Use specifics. Don't just say "this money is for the school marching band", but "this is so the marching band can have new uniforms as our current ones are x years old." The buyer will take off with it and you'll lose a customer. You want people to think you really need this.

Summary:
Learn as much about your product as possible. Keep in mind that these people you sell to give you only a little bit of their attention, so make it quick. Emphasize the special features of your product. Do not mention any flaws in the product you are selling. Always emphasize the cause. Never offer to give away an item for free. Don't act like you've sold much, even if business is doing well.