it's a very difficult decision to make, not only an expensive decision to make. I probably wouldn't recommend it for you, but then again you could make me eat my words if all goes well. But here's my rule of thumb.
I honestly ask myself, do I really feel that confident about my tank that I can raise this piece of coral yet? and can I afford to take that risk at X price?
Not until recently did I finally get enough confidence to buy another anemone (I bought my first, and only, anemone a few years back, It died a miserable beginner death
) As of late, my larger tank has been doing so well that I finally have the confidence to do it again.
My personal question right now is... Can I really handle a clam? i think so, but at the cost of 50-70? i dunno quite yet...