True endlers are not hard to find. What it requires is that you look for evidence that the fish being offered are designated as class N, natural, fish. There are tons of fish being called endlers as a common name that are class K fish, crosses between endlers and guppies. A true class N breeder, which I am, can supply information that supports the class N designation. I am a registered class N breeder. My own class N fish derive from a collection by Armando Pou in 2000 from Laguna de Los Patos in Venezuela that was then bred in a large colony breeding situation by a person known on the internet as Tampafishman1. He is the person who maintains the SMP population of endlers in his Florida ponds. I bought 3 pairs of class N unselected fish from him about 3 years ago and have maintained my own stock completely separate from any possible cross breeding situations. My guppies are not even allowed in the same room as my endlers because I will not take the chance of an unexpected cross breeding. Instead my endlers live in the family room while the guppies are in my "fish room" on a different floor of my house. I do not take any chances that these fish will ever cross and that means that any fish that I would be willing to supply you come with my personal assurance that they are pure class N fish. I sell tons of my class N fish every year at club auctions that yield me not much more than fish food costs. Class N endlers are simply not as much in demand as class K fish. The so-called tiger endlers are far more popular and demand a higher price than the pure fish that I have.