Had a purple and a gold on separate days. Don't really know if they're really that rare anymore but I'm hanging on to them nonetheless. Posted a thread here asking for assistance, but I don't think many people know what to make of it.
unfortunately, that "rare" skin is dropped quite commonly by smites in underworld. was quite exited the first time saw one too, but now I usually merchant even the gold ones unless they have some "sellable" stats.