When I was living in America working at a very popular LFS, it wasn't uncommon for us to bring in Blue Linckias or feather stars. Part of the reason you dont see them as much as youd expect given the number collected os because so many die in the supply chain or shortly after arriving at the retailer.Im not sure how it works in your part of the world but over here they are fairly rare to see them in shops, most of them just refuse to bring certain organisms to their shops. I can’t remember seeing a true carnation coral in any of my 10 local shops for a good few years.