Try petfinder.com, or try to locate local rabbit rescues to help you promote your rabbit for re-homing.
I would not recommend Cragslist. There are too many suspicious people there that might falsely promise a good home. Also I would not recommend giving the rabbit away for free or a cheap price. This also attracts people that may not give good homes. Some sad examples are they might use the rabbit as snake food, dog fighting bait, rabbit meat, etc.
You can justify a higher price for the rabbit by simply bundling the rabbit with toys, blankets, etc.