The trade system needs to be kickstarted with a list of known trade / price valuations. The authors of the currency paper have outlined a price reference chart, which has been debated over heavily since its release.
Natural Materials:
Raw Cobblestone Block = 0.4 ₲
Spruce Log = 2 ₲
Oak Log = 2 ₲
Brich Log = 3 ₲
Jungle Log = 17 ₲
Iron Ingot = 3 ₲
Building Materials:
Single Brick = 1 ₲
Brick Block = 4 ₲
Terracotta Block = 5 ₲
Smooth Quarz Block = 6 ₲
Quarz Bricks = 14 ₲
Iron Block = 27 ₲
Comestibles:
Bucket of Milk = 1 ₲
Bundle of Wheat = 4 ₲
Pork Meat = 3 ₲
Beef Meat = 4 ₲
Raw Chicken Meat = 2 ₲
Buildings:
Single Family Row House = 17000 ₲
Three Family Row House (H9-R): 43000 ₲
Four Family Row House (H9-T): 51000 ₲
Infrastructure (Estimates):
Bridge over 10b River: 32000 ₲
Railway Station: 120000 ₲
Railway Siding: 9000 ₲
Rail Line: 1000 ₲ / b
Land:
Inner
Rochester: 35 ₲ / b
Outer
Rochester: 25 ₲ / b
Loirent: 120 ₲ / b
Creston: 22 ₲ / b
Chelsea: 27 ₲ / b
Kensington: 270 ₲ / b