Rune dart

Rune Dart is a members-only item on the OSRS Grand Exchange in the runes category.

In-game examine text: "A deadly throwing dart with a rune tip."

It has a Grand Exchange buy limit of 11,000 every four hours, a high alchemy value of 210 gp, and item ID 811.

View on OSRS Wiki

Rune Dart shows an active flip setup with a margin of +5 gp and 2,482,398 trades over the last 24 hours.

At the buy limit of 11,000 every four hours, max profit per cycle is about 55.0k gp — high margin with healthy liquidity.