An encounter that happened to me and a colleague when we were about to leave the local precious metal dealer.
A couple went in after us, and the man asked for all the silver they have on stock. The clerk explained that there's a 10000oz limit (I'm not kidding) per transaction. The couple then said that they'd take everything.
The clerk then went to get the big boss. That usually never happens.
This was before the covid lockdowns, etc.