What is the rarest frog available?

[Fr0gman]

What is the rarest frog available? or keep in captivity? I guess I have 3 questions.

1. What's the rarest dart frog?
2. What's the rarest dart frog in captivity Zoo, Universities etc
3. What's the rarest dart frog in captivity that's available (Lets say your on the list and have friends in high places)

[hkspowers]

Now I am not sure about the dart frog thing but from my own research I beleive the rarest frog in captivity is the Amazon Leaf Frog (Agalychnis craspedopus) Sp? I have been searching for this frog for the longest time to no avail.