Sil, the suggestion that you market the 4 by 5 film holders in packages of 10 or so sounds quite reasonable. If you truly have the quantity that my inferences have envisioned, I will take a package also. Please announce when you are ready.
2F/2F, history is always interesting. Photographs of history only add to it. Please make sure that the older photographs you have of things like that are put into a form that can be stored and made available to others. We are losing much of our current history due to simple lack of knowledge of what these photographs represent and the stories behind them.
It is really snowing up here in Latte Land today. There are some advantages in being paid to stay at home, and are no longer required to go out driving in it.