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Check out this article about finding a good manufacturer for your business.

Some might ask for L/C (Letter of Credit) or request that the money be transfer T/T (telegraph transfer~i.e. Western Union or via your bank). They will state their minimum order quantity, FOB price (price per piece, unit or however else item is packaged). They may also ask for concept drawings or protytype so they can access whether they can fulfill your request or not. You'll need to verify their reputation and legitimacy by either having someone else verify them or you yourself verify them personally by traveling to their manufacturing location. You can find manufacturers by visiting trade shows, ThomasNetor service directory. Also Google trade journals or publications for industry your considering launching your product in, many manufacturers and suppliers post their company's contact information on such sites.