Sig-Gold Model P-220 - Does anyone know the value?

I have purchased a Sig-Sauer Model P-220 .45 Cal. Semi-Auto .45 Cal Gold Model. There were only 200 made. The gun has gold accents with a gold crest on the top of the slide. Can anyone give me an idea of what this gun is worth. It is new in the box and made in Germany.--Thanks a million for your help--Dennis