We were given a small rolling safe some years ago that I've tried several times (unsuccessfully) to crack. The combination had been lost, and the owner had moved to Alaska leaving no forwarding address and dropped off the face of the planet. The only condition was, "If you get it open and there's any personal-looking papers in there, please send them back to me. Anything else in there is yours."
Wonder if I could rent one of these automated safecracking machines for an hour or so?
I suppose one of these days we'll have to call a locksmith and say, "Hi, open this for us, please."