A 97-year-old La Jolla man and his 85-year-old wife say former Disney star Erik von Detten talked them into putting $2.15 million of their retirement savings into overpriced gold coins worth only about $1.36 million at the time – a nearly 60% markup that left them with roughly 400 fewer ounces of gold than they would have gotten at spot prices. The TV-advertised precious metals dealer he worked for, Rosland Capital, has since collapsed into bankruptcy, owing customers $49 million for gold and silver they paid for and never received. Norman and Sheila Greenberg sued von Detten and Rosland Capital...