The guppy lines are already very impure, there are loads of hybrids (my friend has poecilia reticulata/gambusia species hybrid afaik), so would there be anything wrong with hybridising Endler/guppy and selling the mix/passing it on AS A GUPPY?
I <3 Endlers, but I can't get them where I am either and I live in Australia which makes it hard to use online things. My rents hate online things as well. They've promised me a big aquarium when we move (currently 20l, tiny glass box) and I was planning to fill it with tetras, mini cories and livebearers. If I stuck guppies and endlers in there and sold any guppy or endler fry as guppies because of hybridisation would that be k?