Snails and hermits can be done by hand, just be careful if the Turbos have a good hold on something. Don't twist the shell or pull suddenly as that can injure them.
Assuming you mean something like a skunk cleaner, the relative costs for one of those vs. clown aren't too surprising. It varies by region of course, but skunk and fire cleaner prices I've seen are usually around or above the price of the more common clown species. Sometimes it's quite a lot more for the fires. In addition to availability, I suspect the fragility of the animals is at least partly what drives the price up, as those shrimp stress easily and are also tank canaries for params heading south. CBS are a bit hardier and peppermints are about as bomb proof as you can get for a shrimp, and the prices I've seen both in stores and around the web weem to reflect that as well (1 skunk = ~2 CBS = ~3-4 peppermints).
EDIT: somehow managed to leave a bunch of words out the first time.