The Rust item “Half Height Bamboo Shelves” costs 25 Scrap to buy at Bandit Camp, and it can also be researched through the Tier 1 Workbench tech tree.

In-game cost

  • Buy price: 25 Scrap.
  • Alternative unlock: research via Tier 1 Workbench tech tree.

Real-world shelf prices

If you meant an actual bamboo wall shelf, retail prices vary widely by size and style; examples found online range from about $33.99 to $38.24 for bamboo wall-shelf sets, while larger decorative bamboo wall-shelf listings can be much higher.

Quick note

Your phrasing looks a bit mixed between Rust and a real bamboo wall shelf, so the answer above covers both likely meanings.

Information gathered from public internet sources.