I recently visited a local antique store in Maltby, WA that I have bought marbles, and other items, from for years. He used to keep the marbles in a case in the back room, opening it for regulars to look at. He had a lot of older mibs in bags, pricing them per mib. Recently he decided to change things around, and move the marbles up front. He found a bunch of empty bags stuffed under the case, indicating people he trusted had been stealing from him. I was crushed, as he had no idea who was doing it, and suspected all of us. My wife and I have always been scrupulously honest in dealing with him on all purchases.
he bagged all of them together in $10 bags, over 100 bags in total. All sealed, so no individual inspection possible. Very sad…