Hello, I`m from Bulgaria, The project is gsm car alarm,with a few options. This alarm can be used for car or for home and can be used in all world . Тhe buyer does not necessarily have to be from my country.
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Try selling it on ebay or The Amazon thing where you send them your stock and they take a cut, it will give you an idea how popular it is. Good luck with it, i hope its the start of a successful business for you. Look at your competition and try and find a angle they havnt covered, if as max says you cant find a need, the next alternative is to induce a want in people.