Bat bones

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

In-game examine text: "Ew it's a pile of bones."

It has a Grand Exchange buy limit of 3,000 every four hours, a high alchemy value of 1 gp, and item ID 530.

View on OSRS Wiki

Bat Bones currently has a flip margin of −7 gp, which isn't profitable to flip right now despite 1,468 trades over the last 24 hours.

Items with negative or zero margins like this are better watched than actively flipped until the spread widens.