I believe Rusty's Reefs has the best prices on Snails, Hermits and Emerald Crabs. Unfortunately, this means they sell out fast!
Also, those animals are typically healthy because Rusty puts them in his regular tanks to eat algae. This way, when we bring them home, they are not still starving to death due to the long transport from the ocean and the sterile condition of a small holding tank.
Aloha,
Mark