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Here's how to earn lots of money with Tin Rarity Items!
Step 1. If you can, buy Tin Ore/Ingots at a trade portal.
Step 1a. If you picked ore, you need a furnace. Craft as many tin ingots as you can. (I must warn you: this may take 2 hours to finish)
Step 3. You need water to get through this step. Pick up water to make Buckets of Water.
Continue at part two.