The long tentacle ones are really cool looking. Heliofungia. They had a low life expectancy though since supposedly they are the goniopora of right now in reefing where people aren't quite sure what they need to survive past 6-8 months. That being said, super cool, but I don't think I'd buy one for 200. If you are interested, there are cheaper places to grab one.
Ahh good to know! I thought they'd be more expensive! They have a long tentacle in their display, have had it I think 1-2 years and it's always fully extended and amazing. I'll get a picture/video tomorrow. It's probably 12" at the base and easily has 12" tentacles!