Question: what are gold dimes worth?
Answer: Unfortunately, a gold plated dime is still just worth 10 cents. Unless it happens to be a pre-1965 (silver) dime, the actual metals value is about $0.01 as of Jan 2016 (1965-2014 Roosevelt Dime Melt Value ), and the gold plating is likely to be only atoms thick. The gold adds essentially zero value to the coin.