Startup Idea : international trade

in short ,create a web site for international trade people can share any thinks have and any things need, but this site have some limited condition,for example just people registred have bank account and just shared trade big than 1000$ ,in last we can create a virtual shop and so real shop ,for real shop i think better use a big ship than move Around the world and sell and bye some thinks in ports and have program for this move,i think this is future trade and we can see big companies in this trade and etc