Automatic Carton Packing Machine (Polygon mesh 3D model) is available on CGTrader for $389. Original author: Lovano. Specs: 4324576 polys, 12973728 verts.
SLDPRT (SolidWorks, filesize: 507 MB), OBJ (OBJ, filesize: 335 MB), FBX (Autodesk FBX, filesize: 945 MB), STL (Stereolithography, filesize: 206 MB), IGE (IGES, filesize: 196 MB), STP (STEP, filesize: 46 MB)