Picked up a S&W blade saver at a recent gunshow. Pretty interesting item. It's a device for holding safety razor blades so that they can be sharpened like straight razors. As pictured on page 391 of Standard Catalog of Smith and Wesson 3rd edition. Is there any collector interest in these? Value? Standard Catalog says $100. Is this realistic? This one is in fairly good condition with good S&W markings. Anyone else have one of these or collect them? Thanks for your help....