I listed a wanted message on craiglist for bunny poop. The man I get them from sells one of the great big brown paper yard bags for $10. He even calls in the spring when he has them ready to go, and since first bagging them up for me, he now has a steady group of gardeners who buy from him. He's not getting rich, but likes that the poop is going for a good use and not just in the dump. Hubby tills them into my compost/vegetable garden each spring.