With my experience there is a 99.9999999999999999% chance that it is fake because I believe there were only like 500 or so made. Bring it by a dealer though because there are several tests that he could do to see if it's real and you never know maybe it could be real. If it's fake then depending on what its made of it's probably worth around $2 (assuming its not real silver) and if it is real than its value would depend entirely on its condition and where you sold it so it could go anywhere from $100,000 to over $1,000,000.
I Own A Silver 1861 Confederate Half Dollar Coin Where Both Sides Are The Same, Do You Think It Is Worth Anything?
There were only 4 made and each had the US sitting liberty on the obverse because the CSA simply planed off the reverse and restruck the CSA seal