Jeff, Really, all of them are likely to be scrap value. There are indeed some dates, like 1919KN etc that are scarcer, but with a quantity like that, whoever were buying them would probably want to buy them for the scrap value, or a little more, because sorting them properly is likely to cost more time than the coins would cost! Also, there are not really any average circulated pennies that are worth a huge amount, even the likes of 1919KN are worth less than £1 in average condition, same applies for the older ones, which tend to also be much more worn. Where are the coins located? I'd be happy to pay 3p per coin and also come and collect them if you/they are not too far from the SE. For 40,000 coins that would be £1200. They would be good stock for my 50 average pennies that I sell.....even though that many would likely last more than a lifetime!