When I bought the house and was exploring the backyard, I found an old tub, just like this one, painted a hideous shade of red. It was half buried in a flower bed and I think was supposed to be a planter. I did somehow break it up and get it out.
I'll look into trying to get it out in one piece but with new ones going for $300, it's likely that whatever it's worth isn't enough. After all, once it's out, I could have it refurbished. There's a thought.