How do I convince people to buy my product?

I live in Trinidad and Tobago, in the Caribbean. My school is made up of around 500 kids from kindergarten to 12th grade. About 10-15 kids per class. I need to make some money so I've been selling duct tape wallets. I've sold 6 so far for 30 TT dollars a (5 USD) each. It's a good profit but I don't... show more I live in Trinidad and Tobago, in the Caribbean. My school is made up of around 500 kids from kindergarten to 12th grade. About 10-15 kids per class. I need to make some money so I've been selling duct tape wallets. I've sold 6 so far for 30 TT dollars a (5 USD) each. It's a good profit but I don't think people are going to be willing to buy it in a few days time. How can I keep the interest level up, make a profit and get people do order them all at the same time?
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