It doesn't matter what you think it is worth. It is what people are willing to pay for it. So if you want to sell it give it what you feel is a fair price and go from there.
It looks like it takes up a whole 5 gallon bucket. I think you could get a few hundred for it but people are cheap lol Def don't want to break that show piece up. Worst case scenario trade it for something else' you might be better off if you want to get rid of it quick.