Startup Idea : World Wide Items Exchange

You can find people all over the world that want to change something with you. Some products you cant buy on your own country so you can give some iten from your country for an item of the other persons country. You can change itens by mathing a similar value and you are scored if all goes right if the people you are sending dont send to you back you can blacklist that user and others will not change with that person again. I should work for tiny things for example a pack of chocolates or simple things that you can find on a especific place but you will not need to be there to get the local iten.