Automatic Mobile Phone Motherboard Testing Machine (Polygon mesh 3D model) is available on CGTrader for $189. Original author: Lovano. Specs: 4074290 polys, 12222870 verts.
SLDPRT (SolidWorks, filesize: 118 MB), OBJ (OBJ, filesize: 308 MB), STL (Stereolithography, filesize: 194 MB), IGE (IGES, filesize: 233 MB), STP (STEP, filesize: 60.1 MB)