Mithril platelegs

Mithril Platelegs is a free-to-play item on the OSRS Grand Exchange in the armour category.

In-game examine text: "These look pretty heavy."

It has a Grand Exchange buy limit of 125 every four hours, a high alchemy value of 1.6k gp, and item ID 1071.

View on OSRS Wiki

Mithril Platelegs shows an active flip setup with a margin of +15 gp and 9,580 trades over the last 24 hours.

At the buy limit of 125 every four hours, max profit per cycle is about 1.9k gp — high margin with healthy liquidity.