First off, why do you respond to her when I asked the question?
I owned 550 of the B shares of Berkshire at one time. I had someone try to talk me into buying a couple A shares back when it was around $17k, but passed because I was concerned about Buffet's health. Obviously a poor decision.
3M has done little over the last few years.
BTW, in my profile I have my larger positions....if you're interested.
Oh, and the CMKX board has become an off topic board these days. So it's a place to gather.