Private person - wants to raffle site.

The OP never specified the rationale for going with a raffle rather than a straight forward sale. Why?
An individual would likely only be motivated by getting a better price. That or offloading a problem property. There's a lot of work require to push these raffles and sell enough tickets, so no one's doing it for the craic.
 
The OP never specified the rationale for going with a raffle rather than a straight forward sale. Why?
Well there is a good possibility of getting a better price + a contribution to a charity. It may not be the norm yet but why not.