Hi Gary,
Let's look at this from this perspective. I specifically look for varieties. The average collector is not as specific in their searches as I am and most are just looking to fill in dates in an album.
I've looked through 5 to 6 million coins in the last 8 years or so. Just on 1984 (Philly) cents alone, there were 8,151,079,000 coins minted. Of course there are a limited number of Doubled Ear cents, but even the most diligent roll searchers have not touched the surface of that 8 billion plus 1984 cents out there.
Finding coins in excellent condition from the 1980s is still commonplace so there is a fair chance that if a 1984 Doubled Ear cent turns up in a roll, it will still be pretty nice and not ripped off from someones collection.
I've found multiples of the major die varieties in my searches and they were just coins that came from normal channels of commerce and that ended up in banks.
A classic example for me is an Amish gentleman back in PA that used to bring cents to a local bank in five gallon pails. I lived three blocks from that bank and I would get a call every time he showed up. Five 1983
DDR cents came out of those buckets. I kept the best one and sold the rest.
Many of us in the die variety world are aware that the 1983
DDR cents first popped up in the Lebanon County area of PA. so I had a better than average chance of finding some. The point though is that there are trillions of coins out there, maybe, conservatively a few thousand roll searchers looking for die varieties and many of the coins are still out there for the finding.
In all the years (more than 40 now) You can tell , if a bank lets you know that an 80 year old woman just dropped off some old coins, you can guess that an older collection may be being brought in for cash.
Most stolen coins that are parts of collections end up in other places and rarely end up in circulation. In the overall scheme of things, stolen coins , eve if they did enter circulation would by the percentages be an astronomically small number of coins when compared to the number of coins out there.
If you find a small pile of silver coins or a few silver dollars in the drawer at a little quik-mart, for example, I might suspect some hanky-panky. The stuff that comes from banks rarely if ever would contain stolen coins justas a matter of percentages.
It is possible but not probable:-) So, are the chances of finding good coins in rolls good? You bet!
Have Fun,
Bill