Antique Cast Iron Doorstop Sandy Foundry worker book end door stop

I got this in a huge box at an estate sale, I KNOW NOTHING ABOUT IT!!! if you have specific questions ask I will do my best to answer, I found one on here asking $375 and another for $39.99 so not sure why a huge difference, I figure best way is start at .99 cents with no reserve and it will bring what its worth.. sound fair? Thanks and good luck