about 10 years ago a family member went to Vegas and brought me back two $40 Harrah's Sax Player silver strikes and the following year brought me back one $10 Stratosphere King Kong silver strike.. I sent them with a friend who went to Vegas last week to play them for me and the cashier told him that he'd better hang on to them as they could be worth some money.. my question, of course, how much are these worth? I had no idea they were anything special. Any help would be greatly appreciated.. thanks so much!