What regular production coins have completely disappeared from circulation? I highly doubt there are any large cents, 2 cent pieces, 3 cent pieces, or half dimes out there. Coins before 1880 or so are probably extinct in the wild, but there could possibly be a few left somewhere that have been overlooked.
Most large dollars except for clad Ikes are gone. I've found halves as early as 1952 out there but I haven't found any standing Libertys. Hell, even the SBA dollar coins are rapidly disappearing.
I had a lady come in when I was at work who had a Morgan Dollar amongst her change, so they arent completely gone
As long as there are people who have older coins at home there will be people who at some point spend some of them and put them back into circulation. How long those old coins stay in circulation, that's another story. But it happens on a daily basis.
I worked at a bank about 6 years ago and I would on occasion see quite old coins come through. Morgan and Peace Dollars, Barber coinage, Buffalo nickels. I didn't ever see any old large copper or gold...but most everything else seemed to come through at least once. However, I saw thousands of dollars each day and these occurrences were quite rare.
During hard time all types of coins and currency will make an appearance. One of the tellers at a local bank, had a young person come in with a $10.00 gold coin, that he could not spend it, so, he asked for change. About three months ago, my bank, had a guy come in to get change for a $500.00 note. If I had been in about 30 minutes earlier, I would have looked at it and bought it. Then you have people that steal and then spend coins and currency that they have no idea of their value. So, we that ask, and look sometimes find such items. I keep searching. I came across a H&R M1 Garand rifle at a garage sale last week.
Just out of curiosity...how much were they asking for it? I bought mine in 2006 for $600 but I have heard they sell for a lot more now.
Three or four years ago a bank teller showed me an 1836 half that a convenience-store owner had brought in from his till. I can't imagine that any cashier would willingly accept odd denominations or sizes -- half-cents, large cents, 2c, 3c, half-dimes. They might or might not take a 20c piece as a quarter. Most likely they'd reject it as "foreign". These days, such coins are most likely to turn up in the reject bin of a CoinStar machine, I guess, not that I've found any of them yet. Gold is a separate issue. I've seen stories here of modern 1/10-oz Eagles showing up in dime bins, but it's hard to imagine there are very many people who wouldn't recognize a gold coin as something special.
My sister-in-laws' brother who is physically a wreck took a fair quantity of 90% silver coins to the bank when he needed some cash. My brother saw the coins earlier and said there had to be at least $30.00 dollars face value. My brother has a bank teller that saves old coins for him and earlier this year he got a Morgan dollar and a few silver quarters and dimes.
I see none of the low mintage AtB quarters in my area. I see the high mintages ones now & then, but none of the low mintage ones from the first few years.
I see them constantly. If they're worth anything above face then I'll be happy to buy them and resell them. I've opened up UNC rolls of ATB quarters and put them in the till and didn't think anything of it other than "rats, there are no old quarters in this roll."
I think one of the wildest things to turn up in circulation recent was an 1854-c $5 that was in a bag of pennies I bought it from the ct member who found it