Well, I wear 26 lbs of lead in a single tank setup at home, and Peter wears about 20, so just for the two of us, that's almost 50 lbs! But we have also accumulated a lot of extra weights, which come in handy with students.
The best story is this one: I had a birthday party for Peter's 60th, and had it catered. I got to talking to one of the women who served, and she was asking about the scuba gear in the house. She told me a former boyfriend had left some weights at her house, and would we like them? I of course said an emphatic, "Yes!", so a couple of days later, we rendezvoused and I picked up about thirty pounds of lead. She would not accept any payment for any of it.
About a year and a half later, an unfamiliar car drove up our driveway, and it didn't turn around, as most people who are lost do. So I went out to find out what was up, and it was the same lady. She had been cleaning up and had found about 20 more pounds of lead, and remembered that we were happy to have it!