I once received one badly damaged male variatus from a Mexican friend. No females, and it didn't live long, so it fits the usual profile of the mystery fish that got away. It was an apricot coloured fish that was one of the best looking livebearers I had ever seen. It was bought from a feeder tank in a Mexico City market....
Livebearer lovers have no idea what they are missing by allowing themselves to be channelled into the same old fish in stores. in general, as a hobby, we are poorly served by the industry, but with livebearers, it really jumps out.
When I was a kid, platy tanks were fantastic sources of very beautiful old linebred strains, as well as close to wild type fish. It is sad that we have largely lost that choice and diversity in North America.