Okay this isn't about a roll, but it is the same principle. When I was about 7, in the early 60s I asked Dad why the pennies had three different designs on them. He told me I should start saving the wheat pennies and all of the Indian Heads because some day they would be rare. Following his advice I took a large pickle jar, and using dad's bench grinder I ground a coin slot into the lid. From that day until yesterday when the jar was finally full the only thing that went in that jar was Lincoln Wheat pennies and IH pennies that fell into my clutches. As a young coin collector I knew of only 3 pennies I needed to pay for my future college education. A 55 double strike, a copper 1943 Lincoln, and the mythical 1909S VDB. So said Coin World. Every wheat penny that passed through my fingers for the next 50 years was searched to see if it was one of the two types I sought. If not it went in the jar. In truth, it was 1996 before I held my first 1909 anything. Not an S VDB, into the jar it went. Yesterday when adding more Wheat pennies I realized the jar was now full and, although I knew better by the 1970s, my jar search criteria for wheat pennies had been unchanged and there was a heck of a lot of stuff, that while not as exotic as the 43 copper or the 1909 S VDB, was possibly almost as exotic in the jar. Not even thinking of error coins yet. I find myself suddenly realizing this 40 pound jar of wheat and Indian pennies is technically unsearched barring the two specific searched for exemptions. I will search it again, this time using a 2013 Redbook. It also occurs to me that a 2044 Redbook might have yet more suddenly valuable coins in it and if I am around then I may have to search the jar yet again.. I am thinking I might not be the only roll searcher who is still running on what a 1964 Coin World magazine or a 2000 Redbook said you should be looking for. Many coins not deemed worthy of mention back then have found their way into today's Redbook. 1931S, 1914D, etc.