They will move around a little until they find a spot that they like, It's always best to get one early in a tank before you have too many corals attached that they might harm while they wander... or if they decide they want to put down roots right next door.
If you're not able to do this, you might put a small area of rocks separate from the other rockwork in your tank. They won't travel across sand.
They do really well in most tanks as long as you keep your params up.
Does $135 seem a little steep to anyone else though?