Got gold? Or maybe a vintage Martin guitar? Perhaps you’re not as attached to your grandpappy’s Elgin pocket watch as you once thought, especially with money so tight. For that matter, is that box of sterling silver flatware you only drag out once a year for Thanksgiving really worth the hassle of cleaning up? If that sounds familiar, the folks at Ohio Valley Gold and Silver Refinery and the Treasure Hunters Roadshow want to make a deal. They’ll be in town over the next five days exchanging cash for such items, beginning Tuesday.