Mithril seeds

Mithril Seeds is a members-only item on the OSRS Grand Exchange in the seeds category.

In-game examine text: "Magical seeds in a mithril case."

It has a Grand Exchange buy limit of 18,000 every four hours, a high alchemy value of 120 gp, and item ID 299.

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Mithril Seeds shows an active flip setup with a margin of +33 gp and 75,799 trades over the last 24 hours.

At the buy limit of 18,000 every four hours, max profit per cycle is about 594.0k gp — high margin with healthy liquidity.