It is a pretty rare species and a little more aggressive than most shell dwellers. Females can be very aggressive to each other as they typically spend all of their time around the shell they claim and are very territorial, so it’s good to get them young and have enough space for them. Males just cruise around. They are monogamous spawners, so if a bonding pair is formed, other conspecifics should be removed from the tank. They should be excellent with other species if using in a community.
At 1/2″ I’d only want $10 apiece for them. They typically go for $20/apiece in the 1″ range