An ideal Minecraft will have a money system. This system comes into play when trading with Villagers. This system is measured in Iron Ingots ($), so an iron ingot is $1.
A wood plank or cobblestone block is worth $0.02. A block of sand or gravel is worth $0.03. A full block of wood or smooth stone is worth $0.05. A snowball is worth $0.04, but a block of snow is worth $0.10. An iron ingot is obviously worth $1. A gold ingot is worth $2. A redstone dust is worth only $0.50, but you still get about $2.50 per ore. A diamond is worth $10. An emerald is worth $13. More values will be added later.