I've seen many mushrooms and corals for sale that were very high dollar prices just because they had a small streak or spot of coloration on a field of solid yellow. I struggle to understand how the value of some corals is found but the typical responses to your question is either Yes, No, and Maybe. The market value is constantly changing as supply changes.
Bottom line is always that if it is worth it to you to have that specimen then buy it and enjoy it. If you are only buying it because you want to resell these that is another question and answer in itself.
I have a similar mushroom in my tank. I put it in there hoping that it would multiply and I was going to give the increase to my buddy at the LFS. He sold the store, and I am kind of happy that the shroom never really took off. SOme other shrooms have taken over an area where I had him growing and it was luck to survive. I like all of these, so I am not upset but I would have preferred if the little gold mushroom would have spread instead of the green fuzzy monsters that are growing everywhere.
i only include the last information to serve for you (perhaps) as a guideline for buying livestock for your tank. The purpose of ownership can help define the value of these things. If you like it, buy it!
