Liebherr Crawler Tractor PR 766 Litronic (Subdivision ready 3D model) is available on CGTrader for $129. Original author: Polygate. Specs: 1648560 polys, 1651358 verts.
OBJ (OBJ, filesize: 34.2 MB), C4D (Cinema 4D, filesize: 16.1 MB), BLEND (Blender, filesize: 35.5 MB), MAX (Autodesk 3ds Max, filesize: 236 MB), TEXTURES (Textures, filesize: 454 MB), PNG (PNG, filesize: 454 MB), MA (Autodesk Maya, filesize: 47.5 MB), FBX (Autodesk FBX, filesize: 57.7 MB)