My grandfather used to do this with nickels, dimes, quarters, and dollar pieces. When he passed I got the “random coins” that were literally all years prior to the change in materials.
No idea how much it’s all worth but it’s in the back of a closet somewhere.
I guess this didn’t occur to me because the guy also got the regular brass ones, which don’t have any value above face value to my knowledge. They didn’t contain actual gold at any point.
I would have thought people would have collected/sold the silver ones out of circulation by now.