Hi. I have many exotic species from Green Tree Pythons, rare leaf tail geckos to exotic praying mantids. I like the more exotic hard to care for and find species because I can geek out on them. I have always wanted a dart frog colony, but can't decide what species to focus on. I don't want the common everyone has one of these species. What is considered the most exotic sought after dart frogs species, but impossible to find? Yes I am a glutton for punishment. Price is not an issue. Thank you in advance for your feedback....Tom