Cast Iron Jolly N***** Bank

First off I want to say that I AM NOT PREJUDICE IN ANY WAY, SHAPE OR FORM! I didn't name this thing!

Now with that said, I've just purchased this item recently and would like to know anything about it, including what it may be worth...according to the internet searches I've done, it could be worth anywhere from $200 into the thousands. How would one tell what it's worth? It is in excellent shape and working order. Also, seems to have been made by the John Harper & Co. Ltd., in Willenhall, England. Any other comments or help would be greatly appreciated.