Buy RS3 Ribcage piece
The ribcage piece is a members-only item in RuneScape 3. It is a slightly damaged ribcage. Wallasalkis drop it in the dungeon under Waterbirth Island. These monsters come in combat levels 79, 84, and 91.
This bone has a few good uses. You can trade it to Peer the Seer with 3 dagannoth hides and 10,000 coins to get a skeletal top. You can also trade it with a fibula piece, a skull piece, 6 dagannoth hides, and 22,500 coins to get a full set of skeletal armour. Skeletal armour is a solid choice for players who use magic.
The ribcage piece also works with the Tune Banite Ore spell. The spell turns banite ores into wallasalkibanite ores.
The item is tradeable and noteable, so it is easy to move and store. It cannot be worn and does not stack. You can also disassemble it for Invention. It almost always gives Simple Parts, with a small chance of Variable Components. The base junk chance is 98.9 percent. Grab a ribcage piece and skip the long grind for this uncommon drop.