How much is your cheer ghost dark master worth

Less than one Australian dollar. The reason for this is because there is no such thing as a CHEER GHOST DARK MASTER in yugioh, unless you are looking at a counterfeit card. I think you must be thinking about CHEER CHOST DARK MASTER. Which is still not a real card. Try selling it on eBay for 5 AU. Maybe if you did this someone in the world would come along and buy it. Sorry to tell you this. :(