Likely just me, but every time I pay "big money" for a single zoa or for a 1/2 inch frag, they tend to die.
I've noticed that people that come to look at the tank couldn't care less about some of the expensive pieces.
But I guess if just to show off to others of the community then you need to go high end.
I've just stopped. Got rid of picaso's, haven't replaced higher end frags if they die, and tend to avoid all ads that say "rare"!
Personal level that I've reached. Also due to the fact that I've accepted that I am a "scanner", I don't need the best....
My $0.02