craigs list, and fliers at petshops, vet offices, etc.... you can advertise them for pets/layers, but you can also advertise them as feeders for people with snakes or other herps. Raptor centers are another option as was said already, but the ones near me only buy from the kind of places that produce laboratory animals, for fear of bringing in diseases. If its going to be a regular thing, you might set up a long term relationship with a snake/herb breeder etc. so that advertising and meeting with buyers isn't a job you have to keep on doing.