Auction/advert Website build

Auction website with fixed priced advertised items and 1-49 tickets purchasable at 1/49th item value and winning ticket number of advertised item to be determined by national lottery bonus ball that current week. If members are interested I item at it's full advertised price it was be guaranteed/bought by purchasing the entire amount of tickets available. Giving a guaranteed win of item advertised. Revenue to be made by percentage of item value. Also potential to advertise o the page.