I have a cousin that his side gig was to hit the local banks and buy up their 50 cent coins every week and sort out the old ones. I have no idea if it was worth his gas. This was 15 or 20 yrs ago.
I did the same thing back in the 90's.
I'd go in and pick up a couple of rolls of half dollars, pick out the silver ones.
Went in one day for another roll when I saw the receptionist sitting at her desk, going through half dollars!
Never found another silver coin. 😡!
We bought quite a bit of silver and a couple of small gold coins back when silver was $12/$13/oz.
Kept buying until it hit up around $20/oz and Maple Leafs were over $20/each.
About 6 months or more back, silver dropped to around $12/oz! I grabbed my mad money stash and waited.
I don't think Maple Leafs or Silver Eagles ever dropped below $28/ea. Oh well!
We haven't bought anything since silver coins went above $21.
Just a note:
When we first started buying metals, an old buyer told us, "Don't buy U.S. coins. The Gov't "can" pick them up. Buy foreign coins."
We bought a lot of those "Prospector" coins
While a good investment, it won't hold the same value as a Silver Eagle or Maple Leaf.
Coins stamped with a monetary value are more recognized as a "monetary" unit.
FACT? Uhhmmm.....I don't know, but it made sense to us at the time