For a 50-50 raffle, half the proceeds go to your school (or other charity) and half go to the raffle winner. Have volunteers circulate the room carrying baskets with balloons tied to them. Sell your raffle tickets individually or at a special discount
for an "arm's length" worth of tickets. Get some of your tallest volunteers to handle this to add a bit of fun. Not only will you bring in some extra funds, but the volunteers are in a great position to help promote your auction items as they sell their tickets. Best of all, you don't have to use any of your valuable auction donations for this fun raffle!