I know the concept sounds strange but it is lots of fun and it's not at all as easy as it looks. You see, the idea is to come up with the lowest unique bid for each item. You can place as many bids as you want using either the website or their easy to use SMS system. The winner is the one who bid the lowest sum as long as no body else bid the same sum. Any sum that has more than one bid gets disqualified and the next price up (measured in cents) is tested. There's a lot of psychology involved in getting the right  bid price (a bit of luck won't hurt either) and you can win one of the many prizes online or even come out with a nice sized cash prize. You don't actually have to pay the sum you bid, it is just for determining the winner. The prizes are giving out free.