$250 for a single polyp of hallucinations. Luckily it has grown out and still alive. It has more than paid for itself in trades and a few sales. I had trouble selling it at $80 awhile back though so it definitely has gone down in price.
I think if you can keep a high end coral alive it's definitely better to buy just one and trade it to get a bunch of cheaper stuff or other high ends. If you buy a lot of cheap stuff you're going to have a hard time trading or selling.