GSP anyone?

[Delphinus]

I've got this large chunk-o-green-star-polyps maybe about 8" x 4" roughly, on maybe a 1-2 lb rock. $20? OBO? or trades? It just sits in the corner of one of my tanks, I have pockets of GSP elsewhere in the tank, so I thought maybe I should try to free up the space.

Will try to post a picture later.