Freman, do you have to be present for the drawing?
We did this kind of raffle for my high school band. The "prize" was usually something donated by one of the local merchants. We would sell hundreds of tickets, (but usually less than a whole roll) draw the winning ticket out of goldfish bowl at the band concert, announce the winning number, post it all over town on bulletin boards (churches, stores, bars, American Legion, etc.) announce it in the local weekly newspaper and... and... and... NOTHING! Many years no one came forth with the winning ticket to claim the prize.
It wasn't an intentional scam, but I can see how it might have looked that way.
The solution was that they finally changed the rules so that the winner was drawn during intermission at the spring concert, and you had to be present with ticket in hand to win. People groused about that, too. But they could then just keep drawing tickets until they actually had a winner.
Lindy