Eyespy you said a mouthful! (Most of which is over my head)
All I know is what I have been told from three different reptile vets that I have been to, it's a different type of test that needs to be done to find crypto, still with a fecal sample but it's treated differently. I don't know all the facts but then I never requested a crypto test because I never had an animal with symptoms. from what I have heard this test is not that much more difficult than a regular fecal, so I'm not really sure why it costs so darn much. Remeber, I am in the states so things may be completely different here.