Echo crystal

Echo Crystal is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "A crystal of rebounding potential."

It has a Grand Exchange buy limit of 8 every four hours, a high alchemy value of 90.0k gp, and item ID 28942.

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Echo Crystal shows an active flip setup with a margin of +63.1k gp and 745 trades over the last 24 hours.

At the buy limit of 8 every four hours, max profit per cycle is about 504.9k gp — high margin with healthy liquidity.