Charity Needs Help Raffling Off a Prius

Hello - I am writing on behalf of Baypath Humane Society of Hopkinton. We are a non-profit (501 c3), no-kill, dog and cat shelter in our 31st year. We are hoping to do a car raffle fundraiser in '09 and have selected a Prius as a raffle prize. Was wondering if there is anyway you could help us promote and market the raffle? I.e., are you an active group in the Greater Boston area? Do you have any events we could come to and sell tickets? Does anyone have a connection with a local dealer? We are hoping to strike a 10-20% discount given we are a non-profit, in exchange for promoting their business in conjunction with the raffle. Any ideas, advice, also welcome. We would begin selling tickets in January and hold the drawing in earlyl fall. Thank you.