Last Fall I was on the yard sale circuit and encountered a child-size plastic bucket full of shiny Mexican coins. My immediate check for Ag or Cu was pointless, but my mind started working. Hmmmmmmmm.
There were over 250 pieces of mid-1980s Mexican 1 peso coins. These are the exact size of a US quarter, but made of stainless steel. The yard sale lady said that her husband used them for poker chips. No idea of where he acquired them, although she said "they've always been around." He's now in a nursing home and has no need for them. Tried them for that purpose and they work pretty well. The $1 (one peso) marking initially excites unknowing friends, but that fades fast. Virtually indestructible, you know.
I also found another use for them. They make dandy washers for many building applications. Just drill to the size you need and have at it.
By the way, I paid $1.00 for the hoard and kept the bucket even though I'm not prone to playing in the sand. Anyone know what a pound of stainless is worth these days? Thanks.