Betcars is an auction site for used cars. Everybody can register and, after some validation process, add their cars to the site. System will ask for some data of the car and will also notify some privileged users that a new car has arrived. These privileged users will check the status of the car, and if they see it ok, system will notify the seller that the car can be a new auction in the site.
Betcars will also help the seller suggestion an auction starting price. Anyway, that's only a suggestion and seller will decide the definitive starting price for the bid. System will also ask and will suggest a "buy direct" price. If the bid reach this "buy direct" price, auction will end inmediately.
Once bid has started, other registered users can make their bids or also choose the "buy direct" option.
Bids have an "ebay-like" autobid option. Users can decide how much they would pay for the car and the system will automatically add new bids for this user when needed until this "autobid price" is reached.
Once auction has ended, and if there is a winner, the winner needs to pay an amount as a booking for the car, meaning that he/she is indeed interested in the car. When Betcars receives this pay notification, seller and buyer will be notified and asked to close the deal.