Rune platelegs

Rune 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 70 every four hours, a high alchemy value of 38.4k gp, and item ID 1079.

View on OSRS Wiki

Rune Platelegs shows an active flip setup with a margin of +396 gp and 93,064 trades over the last 24 hours.

At the buy limit of 70 every four hours, max profit per cycle is about 27.7k gp — high margin with healthy liquidity.