In my town I have 3 potential sources for silver: my normal LCS, an antique shop, and another LCS that is typically priced a bit too high. I sometimes still go to the 2nd LCS because they get some interesting pieces in. In this case, they had just gotten a great deal on a tube of these 1980 Mexican Onzas and were selling them at generic price to move them.
If I had more cash on hand, I would have gotten more, but as it was, I took two of them, and counted it a good score.