Barry, even if you could compile (or if someone else already has) a set of lists for various times and places, how can you be specific enough to make it useful? Maybe a value per acre will tell you something, but how will you account for such things as whether a house was on the land, and if so, how large the house was, or whether the well had gone bad, or if there was an orchard or whether the fields were ready for planting or needed to be cleared, or any number of other factors?