I love reading these type of threads about "rare" corals, because it's really interesting to know what is "common" and what is "rare" in different parts of the world.
These corals are fairly common here in Japan to the extent where most well-stocked speciality marine livestock stores tend to have one in stock fairly often. I'm not sure how cheap corals are in other parts of the world, but these definitely are not on the expensive side of the spectrum here.
But on the flipside, there's plenty of things we don't seem to get here in Japan that seem to be really common on these forums.