Startup Idea : Online mobile game based on trade economy

My game idea is based on interaction between players where they will buy and sell each other virtual products (from iron to aircraft). Each product will have its quality coefficient so you will have to use price/quality ratio to find most affordable products. You will buy quality but cheap products and then will sell it with more price Also there will be a product maintenance feature with what you will increase the quality of your products, to create a better value for the further sale. In advance, there will auction feature where buyers will fight for a product and seller will get more or less of excepted income. It s possible to create more and more features for fun