Purple dye

Purple Dye is a free-to-play item on the OSRS Grand Exchange in the other category.

In-game examine text: "A little bottle of purple dye."

It has a Grand Exchange buy limit of 150 every four hours, a high alchemy value of 3 gp, and item ID 1773.

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Purple Dye shows an active flip setup with a margin of +256 gp and 2,262 trades over the last 24 hours.

At the buy limit of 150 every four hours, max profit per cycle is about 38.4k gp — high margin with healthy liquidity.