5 dollars fulfill all buyers and sellers needs. All products has a fixed price which is 5 dollars. Sellers can display their product with the price of 5 dollars, buyers need to register for an account and then enter the lottery for any product that they want by paying 5 dollars. For each product a lottery will take place after a certain of time. However a winner will win the product and the seller will get the price of his offered product plus an additional profit