|439,600 per hour|
2,800 x Black dragon leather (8,696,800)
Black dragon leather is used to train Crafting, and it is always in high demand. Because black dragonhide must be tanned into leather before it can be crafted, tanning the hides in bulk can be highly profitable.
Because the price difference between hides and leather can be fairly small, it is important to buy the hides for a low price and sell the leather for a high price; you can lose out on up to 50% of the profit if you are not patient. Test the profit by buying one black dragonhide and one black dragon leather. If the difference between the two is less than 200, it may be worth it to switch to green, blue or red dragonhide.
To create black dragon leather, black dragonhide must be taken to a tanner. Ellis, in Al-Kharid, is the quickest tanner, and there are no requirements to use him. Withdraw 27 black dragonhides from the bank south of the tanner and 20 coins for each hide you want to tan. Run north into Ellis's building and right-click Trade Ellis. Tan them all, and run back to the bank. Each run takes approximately 25 seconds while running, and 45 seconds while walking. This averages out to about 2,800 hides tanned per hour, yet a player can tan around 2,000 hides every hour without the use of energy or Stamina potions.
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