Lockpick

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

In-game examine text: "For picking tough locks."

It has a Grand Exchange buy limit of 250 every four hours, a high alchemy value of 12 gp, and item ID 1523.

View on OSRS Wiki

Lockpick shows an active flip setup with a margin of +2 gp and 42,398 trades over the last 24 hours.

At the buy limit of 250 every four hours, max profit per cycle is about 500 gp — high margin with healthy liquidity.