What about buying lots so you designate that you’ll be selling 200 tickets at £2 each and the winner gets a cake? You could specify what type of cake (for example a chocolate explosion cake) or you could set a max amount ‘to the value of’. That way it’s a small outlay, same as a lotto ticket, but with much better odds of a result!
Mel, Yorkshire, http://www.facebook.com/doncastercustomcakery