Seaweed

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

In-game examine text: "Slightly damp seaweed."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 1 gp, and item ID 401.

View on OSRS Wiki

Seaweed shows an active flip setup with a margin of +3 gp and 226,024 trades over the last 24 hours.

At the buy limit of 13,000 every four hours, max profit per cycle is about 39.0k gp — high margin with healthy liquidity.