Check out Game ready Coffin wooden Low-poly 3D model on CGTrader for $12. High-quality mesh by benoit3d: 192 polys, 650 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 13.1 MB), OBJ (OBJ, filesize: 14.9 MB), FBX (Autodesk FBX, filesize: 7.47 MB), 3DS (3D Studio, filesize: 18.4 KB)