Kobelco SK210LC-10 Long Arm Excavator (Subdivision ready 3D model) is available on CGTrader for $139. Original author: Polygate. Specs: 925431 polys, 943711 verts.
OBJ (OBJ, filesize: 140 MB), MAX (Autodesk 3ds Max, filesize: 455 MB), C4D (Cinema 4D, filesize: 85.8 MB), FBX (Autodesk FBX, filesize: 44 MB), BLEND (Blender, filesize: 136 MB), MA (Autodesk Maya, filesize: 120 MB), MEL (Maya Mel Script, filesize: 22 MB), 3DS (3D Studio, filesize: 11.6 MB)