It's going to be hard to sell because it's so specific. You might be able to find a collector of Magmas' or somebody that farms giants. The high req is going to be a big turn off though. I'm not sure but if there is a place to farm giants that cast hexes on you then it might be worth something. Otherwise it's pretty much garbage besides the rare person that collects these types of things.
If you can get 10k for it I'd take the money and run...