I like them, easy and fast grower. As far as the one you are considering buying, it is really up to you if you feel the price they are asking works for yo.
24.99 for a 2 inch candy cane sounds fair, but I'm getting a lot more stuff with it, I will post pics of everything on Tuesday where i restock completely with coral and such, so the candy cane at the moment is 50/50.
I agree with everyone. They are a nice addition to the tank, and are pretty easy to keep. But they are common enough you can usually pick them up from local reefers and swaps fairly cheap.
These are really easy to keep corals that grow really fast once they have about 3 heads. As everyone mentioned previously, you can usually get them for like $5 a head from other reefers.