No luck in Labyrinth Lord, Swords & Wizardry, Adventurer Conqueror King System. Basic Fantasy Role Playing Game (core rules) neither, but their “Equipment Emporium” does. But I’m a sufficient veteran of the primitive economics wars that I go straight to the listings for metal, and see, per pound: Copper, 9 pennies. Tin, 20 pennies. Bronze, 7 pennies.
Get the hell out of here with that noise.
LotFP has rules for property and investment (that I previously mocked), maybe there. Nope. Of course not.
The SRDs for D&D 5e and Pathfinder do. And they’re free. But meh.
Dang it, Honest Vin wants to know about mining and logging and fishing, I’m sure he’s losing sleep right this minute about it.
One of us is, anyway.