Good deal... keep at it, and soon enough you'll be trading it in at the LFS for credit, trading it to other hobbyists for other corals, or straight out selling (if you can avoid having to resort to just giving it away).
A coral farmer came to a local meeting last month, and surprisingly said that one of the most sought after, easy to grow corals is Xenia. He said he can't grow it fast enough to fill all the orders he receives. I think that's in part due to how poor of a shipping reputation Xenia has. Nonetheless, the LFSs around here can't keep it in stock, and they tend to price it at $50 for a piece about the size you pictured.
Good luck!